Malicious PDF — malware analysis report

Static analysis result for SHA-256 21c409f9659e93a0…

MALICIOUS

PDF

48.1 KB Created: 2020-08-12 21:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f89ce410b5e1157824f7962913c12e25 SHA-1: 01d839a8c101e4a50a4718548eaefed1c5dad654 SHA-256: 21c409f9659e93a02e049869fab7296e56c419c9168e4aa8ef444b0f9c81161f
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body also contains a call-to-action phrase, suggesting a lure to trick the user into clicking the link. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting a malicious intent to distribute content or redirect users. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=free+download+marathi+kadambari+in+pdf+format In PDF document text
    • http://files.sidleystandup.com/uploads/1/3/0/7/130775942/3089407.pdfIn PDF document text
    • http://files.riveterlaw.com/uploads/1/3/2/8/132815298/vixogozis.pdfIn PDF document text
    • http://vuweme.adelanteyouthmission.org/uploads/1/3/1/0/131070364/witenuviluzagi-fubegepoxed-piponosibemofi.pdfIn PDF document text
    • http://files.seasmokepipesandpottery.com/uploads/1/3/1/4/131437423/377c2f.pdfIn PDF document text
    • http://files.louisemartinart.com/uploads/1/3/1/3/131383864/vudevopelol-nojitafoz-karonogelaje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4045/4294/files/nosuwokobefoninoxirobof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3617/1679/files/zupufoxeluko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3488/5792/files/80229684025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1574/8253/files/65176888239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8076/2023/files/dodaxiwopoxin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9397/3405/files/30373920340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/vuwisep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0577/9863/files/47513981859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/history_of_islam_timeline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/78691601719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15125842299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6697/2577/files/ninja_forms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5925/6232/files/punjabi_last_name.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5E 5352 bytes
SHA-256: 980325abac14792541019b1d3001ea3a7f1f644e38070f36b48c60a0f7648c42
font_01_sfnt_off00007178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7178 10128 bytes
SHA-256: ba3c7aa54edd3aeecb83cff6d3d1ca48c4e1cbb9f96394f1cb32c80346d38925
font_02_sfnt_off00009466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9466 9020 bytes
SHA-256: 7c6c4833b2333717a0ecef3648bc73467d351e40199f958ac693943472c90394