Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b3da53d9af28c0…

MALICIOUS

PDF

56.0 KB Created: 2020-09-01 08:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9067f02004214137fa60beb15e73f66c SHA-1: 0969130e4adff6a47301bf6fd43239cb593e6268 SHA-256: 91b3da53d9af28c07d1bac01a5c2e944c63def9c9c5bafd9fa1e311fd7c412f4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes text related to movie downloads, suggesting a lure to entice users to click the malicious link. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating an attempt to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=bgm+movies+2015+free++malayalam In PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6125/6091/files/69333400473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5251/2918/files/22271121326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8972/2534/files/darkening_of_tristram_2019_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/free_indesign_architecture_portfolio_layout_templates.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2e4eb4_33321bad1c22434ea14a490a165a8de2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f6a907_5b934390db29471caaf61451318c376a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e643da_f15b66fbcf884562b9180944d4630d80.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b85eb0_054d84c8dab84b089237ca548b0a0995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6359/1590/files/momidovajilowowepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/rasojomiribodadujedixak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9930/7673/files/3291960353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/7375510677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65621046881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0655/6320/files/nivewedoxovapanamoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/13428276358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4863/9391/files/pdf_datasheet_pic16f877a.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2277/7496/files/6130959503.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00008605.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8605 5504 bytes
SHA-256: 1d9000521593bb4190379a1b54281b2ccc047e3edb4592d2cef48c491260e359
font_00_sfnt_off00007271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7271 5748 bytes
SHA-256: fcac52510a95add8561b00965ff3cd07f2fe3d94716a12e4ec44b04abfd6c0d2
font_02_sfnt_off00009a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A2A 10152 bytes
SHA-256: f51002a304c412c3207f4b17cdc2e5706f8cfb2889dadaaf0ca20e7165a1980e
font_03_sfnt_off0000bd35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD35 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e