Malicious PDF — malware analysis report

Static analysis result for SHA-256 4138c05dba532088…

MALICIOUS

PDF

48.7 KB Created: 2020-07-30 21:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7149bf31984e436177c18ef92a13e29d SHA-1: ee735c607a6ec2e9f4be39c6ef9935e9fcfb2420 SHA-256: 4138c05dba5320887bb11b0b5dea9c5b0b1794b39102ba6263bf0bb1518a16a9
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for phishing or malware distribution. One critical heuristic indicates a malicious redirector link, and another highlights a link farm designed for SEO manipulation. The document body, though heavily obfuscated, contains text related to 'love story in english pdf file', likely a lure. The primary malicious IOC is the redirector URL, 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=love+story+in+english+pdf+file In PDF document text
    • http://files.sharpfokus.com/uploads/1/3/0/7/130738919/2648835.pdfIn PDF document text
    • http://files.gmbscmich.com/uploads/1/3/2/6/132695560/buxatek.pdfIn PDF document text
    • http://files.chineseproverbs.net/uploads/1/3/2/6/132695546/pugejobazefepunujana.pdfIn PDF document text
    • http://files.multiplicitycreations.com/uploads/1/3/2/7/132740278/5728887b8b1.pdfIn PDF document text
    • http://files.customizedtriptofrance.com/uploads/1/3/0/7/130776406/3234898.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/1/0433/0687/7080/files/66179678401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/dapawitexenakukaboderotum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0831/8878/files/nejexew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/nodigolisutagizidalute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9457/3205/files/68917840637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/92168133711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6528/6564/files/88080404667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/79026614615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/kemiwekak.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_off00008206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8206 4984 bytes
SHA-256: aa7c2ecb7a7ee8aa3c9f1aee78bee7bef3638bf96af9a18f6ea4ad5d7f7f11dc
font_01_sfnt_off00009300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9300 10064 bytes
SHA-256: 435160d663cf5cf3a3dc2eda0392bf71610d52491c9a19d35640059f6781f54f

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