Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa0a6a15acedd337…

MALICIOUS

PDF

46.9 KB Created: 2020-08-07 22:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5c8039c04e16b795a99b6a184537f388 SHA-1: cd758c3717da4d4fa78190176c7279b9ffe374cf SHA-256: aa0a6a15acedd337127c011a47a0d510ddc7696b966b86974b06c8a4b3550ee7
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm, designed to redirect users to external sites. One of the primary links points to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to academic material ('Biological physics nelson solutions pdf'), aiming to trick users into clicking the malicious links.

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.com/pify?keyword=biological+physics+nelson+solutions+pdf In PDF document text
    • http://sesaseno.itistheend.org/uploads/1/3/1/3/131379730/3296054.pdfIn PDF document text
    • http://files.umfstudio.com/uploads/1/3/2/6/132681749/0ee74.pdfIn PDF document text
    • http://lazuboked.tbclynchburg.org/uploads/1/3/0/9/130969332/8518783.pdfIn PDF document text
    • http://files.comeshootwithme.com/uploads/1/3/0/7/130776200/9736772.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/1/0431/6335/3250/files/roxugoxesize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/joxineratitafes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/lidigake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/fepimiponanixiguserumifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9362/2935/files/tuvamifuguzuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/python_get_terminal_width.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/pokemon_mystery_dungeon_explorers_of_sky_rom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sovir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0874/3834/files/galaxy_s5_marshmallow_att.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C16 5352 bytes
SHA-256: 386d8d622c0edf1c9924d17b1f5b018d9eef50ec87631463f17a3526709f6d8c
font_01_sfnt_off00007e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4C 10064 bytes
SHA-256: e59dd00dd95ea64ca31979969624347f6bec71fcc8d723cf5ac640ac3d4cd826
font_02_sfnt_off0000a0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0B5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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