Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a57102bfaa48c5…

MALICIOUS

PDF

51.3 KB Created: 2020-08-03 11:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f8fe466e6189e9aad320ad49d19f6d36 SHA-1: a20a68fd59dc929e5cb182f4d3a2a09835d7fcdd SHA-256: e2a57102bfaa48c5a3b740b1c7232f710b30d5cfe09dd5ac9b91ce9126addcb7
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm infrastructure designed to obscure the final destination. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links, suggesting a lure to download further content or visit malicious sites. No scripts were extracted from this sample.

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/pify?keyword=bethanechol+davis+drug+guide+pdf In PDF document text
    • http://files.youarenotaloneart.com/uploads/1/3/0/7/130740011/zorutinawazasiv.pdfIn PDF document text
    • http://files.crysis-cake-scene.com/uploads/1/3/2/6/132681901/noraposorolor.pdfIn PDF document text
    • http://files.innspyre.com/uploads/1/3/1/1/131164312/futonapugawib.pdfIn 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/1/0429/5471/9395/files/kitoborujosenijizapuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3544/2855/files/how_to_convert_string_to_int_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/75621253216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/11090755617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0513/2445/files/kededifojaduxugokifud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0505/1029/files/xirabipobirefasegeverud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/programmable_logic_controllers_fourth_edition_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/xabuzajegabatetewapawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2531/6514/files/jugipalujuvudefidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94215193789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kenetawibonilolususede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53446206952.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 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E15 5524 bytes
SHA-256: f8bba5e5ec1657194d414cb8b1aa0d6db6fbbfe4e3e99469e816cb7697c3da85
font_01_sfnt_off000090e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90E4 15320 bytes
SHA-256: f672251876c15d982363d92f231761d98e169fe5882ccbb2ed25d0c7a213a20f

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