Malicious PDF — malware analysis report

Static analysis result for SHA-256 e781ed28a4c1bf12…

MALICIOUS

PDF

51.9 KB Created: 2020-08-12 02:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5728b371da5305dd52bb88458e53af5c SHA-1: ba45d3882942b85088725d80ae67ffdc7fd0311e SHA-256: e781ed28a4c1bf12e7d7c023e13292884d1ecf5671fee12956343fe487090178
202 Risk Score

Malware Insights

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

The PDF contains a mass external PDF link farm, with one link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'bankersdaily current affairs monthly pdf' and includes the malicious URL. This suggests a phishing or social engineering attack aiming to redirect the user to malicious content.

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.com/pify?keyword=bankersdaily+current+affairs+monthly+pdf In PDF document text
    • http://files.thirdcoastdiscs.com/uploads/1/3/1/0/131070674/fivopusaximowow.pdfIn PDF document text
    • http://files.canalstreetboxinggym.com/uploads/1/3/2/8/132815767/gamimo-firezobo-dukajog.pdfIn PDF document text
    • http://files.seedssown.org/uploads/1/3/1/6/131637362/9045030.pdfIn PDF document text
    • http://datif.stephanrichter.com.au/uploads/1/3/0/9/130969204/1fd15309.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8890/4353/files/vopudowebaliz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7312/7079/files/33791862348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2207/3508/files/diagnosis_of_genetic_diseases.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/laxefasigapabaxirasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9257/3336/files/oakland_raiders_schedule_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1538/6789/files/lettering_calligraphy_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5838/7349/files/xesirowuxubibufaxowip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/segexoladegesowibetigis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/11643324831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/teaching_job_application_letter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3175/6957/files/68154623536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5564/3809/files/sewebi.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_off00007e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E80 5492 bytes
SHA-256: 6bc6bd3f4f526d5e4570db34512f8cfcee1e278fff685f0161203595c45b2096
font_01_sfnt_off000090ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90FF 10308 bytes
SHA-256: 3cdd90f2bf5f4208bed8e26cab7b64fd163ff4271928f02a64c0a2dcb6cdcb86
font_02_sfnt_off0000b43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB43B 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230