Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f4255a4222adfa0…

MALICIOUS

PDF

39.8 KB Created: 2020-08-21 01:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4114114d0cff1922581659cfc36c5557 SHA-1: 43372a8b0304612826f8c5bcd1dd941d6a73ac46 SHA-256: 3f4255a4222adfa0a0dd4628f42cbe845c3a84ab5538f1c5d7cda2f51c645ca6
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Online advertising expenditure report 2017' and the malicious URL. This suggests a social engineering lure to trick users into visiting the redirector, which likely leads to further malicious content.

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.cc/pify?keyword=online+advertising+expenditure+report+2017 In PDF document text
    • http://files.nikolephoto.com/uploads/1/3/0/9/130969220/12929bdcb3dc2.pdfIn PDF document text
    • http://dixefig.poringlandparishcouncil.gov.uk/uploads/1/3/1/1/131163898/jutonuf.pdfIn PDF document text
    • http://files.summitorthosports.com/uploads/1/3/1/4/131483336/bca2559d69c.pdfIn PDF document text
    • http://files.hirojack.com/uploads/1/3/0/7/130776166/dizub_xobopow_zezefugotida_mogakorevuwab.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/1/0432/8521/7436/files/zazadugutovitivir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/45171450056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4013/5575/files/celiakia_dieta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3735/0309/files/kapiwuxisonagap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/chuyn_i_thnh_nh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4518/9794/files/89829099516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7456/8860/files/approximation_for_po.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7741/0724/files/credit_note_in_gst.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/44279151803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/najovoxepipunufo.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_off00005a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9B 5688 bytes
SHA-256: e627d7279a056ff23caacec57b68bf592e73ab50886cd2e4e672557bfdb29e85
font_01_sfnt_off00006e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1F 11196 bytes
SHA-256: bba783915ce229b30cdabe8326a60ab49931f982d2a722382fc780227828484e

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