Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd13af7308c3d545…

MALICIOUS

PDF

42.9 KB Created: 2020-07-26 13:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6a3574998fe8621f18e93646cb7d7674 SHA-1: 2fb35eb0a4e085379384e2f09abd8684849cea8e SHA-256: bd13af7308c3d545cf4b369f3d845033d282487862dfe6a98f948cd2d7426aa4
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains multiple heuristics indicating malicious intent, including a critical finding of a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'epfo portal login passbook', suggesting a phishing lure. The presence of a link farm further supports the malicious redirection pattern. The primary IOC is the redirector URL, which is likely used to funnel victims to a phishing site or deliver further malware.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.cc/pify?keyword=epfo+portal+login+passbook In PDF document text
    • http://files.associatedoptical.com/uploads/1/3/2/8/132814415/pivatusixadagika.pdfIn PDF document text
    • http://files.mrsea.org/uploads/1/3/1/3/131384279/3f66ad4c1.pdfIn PDF document text
    • http://files.rocadog.com/uploads/1/3/0/8/130813799/206740.pdfIn PDF document text
    • http://files.easternontarioadoption.com/uploads/1/3/0/8/130874371/3584080.pdfIn PDF document text
    • http://files.econhistdbm.com/uploads/1/3/2/8/132816165/dolonuti_gofudo_jojewakefo_waxesatamatepo.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/1/0440/8652/6102/files/12437103019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6689/2186/files/xetovuropixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0925/3281/files/genobimuzibipafugureno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/68921958612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/bazajotomuxixebowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/fuzekusojunusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0223/1971/files/31680029553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3494/3389/files/roxobodopidofeledi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/buzewutugebirol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6038/7240/files/54266830763.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_off00006bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF8 4900 bytes
SHA-256: ff95b840fd130e4100540c94ba4585bdfbfa50936f79ab676de1360e2ce945a8
font_01_sfnt_off00007ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA1 9904 bytes
SHA-256: a8b9de6864336860c86fe1cec0d7b71b7fac672af0c3df5c3623a6dc87afb386

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