Malicious PDF — malware analysis report

Static analysis result for SHA-256 a99ea438f5b825f9…

MALICIOUS

PDF

36.2 KB Created: 2020-08-19 12:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6fb1f59e2880b556f58e957518db03af SHA-1: 3ee7658000def93e3f80f683dbe6a3a0be7d4790 SHA-256: a99ea438f5b825f936e69be4e00464529638ce21f1b78aea5ffb06b8895bc8ad
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body, though partially corrupted, suggests a lure related to an 'internal audit report of pharmaceutical company'. The presence of numerous external PDF links, many hosted on shopify.com, indicates a link farm strategy to potentially obscure the malicious redirector.

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=internal+audit+report+of+pharmaceutical+company In PDF document text
    • http://pamazej.aano.org/uploads/1/3/2/8/132814742/621527.pdfIn PDF document text
    • http://files.oregonsummerclassic.com/uploads/1/3/0/7/130739719/nugifusuju.pdfIn PDF document text
    • http://files.niagaramodel.com/uploads/1/3/1/4/131452878/2235489.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/1/0429/2945/5263/files/soxuresijafinelenojurin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6427/7657/files/angular_6_nested_formgroup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0956/3045/files/corporations_examples_and_explanations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3097/7431/files/30649424157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/wubiroxesadiloxemegonari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4774/5698/files/tessa_blanchard_theme_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6295/1065/files/state_policy_on_multilingual_education_in_odisha_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6331/2533/files/nespresso_vertuo_capsule_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/jajipurinubexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5235/2156/files/29205934537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1197/8902/files/pufidamimafigasokojuwulup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/files/4346060069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/nuzavuvobuxurejotib.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 1

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_off0000500d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x500D 5256 bytes
SHA-256: 321e257b185cf752db60b01ea109d0d1c0c50f8080d1590489ec29b4a3bdfc71
font_01_sfnt_off000061c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C1 10028 bytes
SHA-256: 6183f57ed96cea5dd400b18f9c9bd0a7d4b2d5b0dde1d48a6ac1d1e527467a74

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