Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e38338a2f0f595…

MALICIOUS

PDF

49.3 KB Created: 2020-08-16 14:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ae1cec73824039921be052a888338ca6 SHA-1: 5d17a0c7d14406c5fc10f4c7ca99912e3b97ae43 SHA-256: 83e38338a2f0f5953014566d624b34e5cbab0e1896b580cc69c029bcece0e296
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service identified as malicious. The document body, though heavily obfuscated, contains text related to 'parent functions and transformations guided notes' and a URL that appears to be a lure for free downloads. The presence of a malicious redirector and a large number of external links suggests an attempt to drive traffic to potentially harmful sites, likely for phishing or malware distribution.

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.com/pify?keyword=parent+functions+and+transformations+guided+notes In PDF document text
    • http://lopamedi.steelheaders.org/uploads/1/3/1/3/131380999/7140927.pdfIn PDF document text
    • http://files.elementallstarsparentassociation.org/uploads/1/3/1/8/131856112/xofax.pdfIn PDF document text
    • http://files.hesswebber.com/uploads/1/3/0/8/130814601/xoxikoxukiti-xokesikopotak-pulejexurinozaj.pdfIn PDF document text
    • http://files.friendsofyololibrary.org/uploads/1/3/2/6/132682676/e1f0dc1091.pdfIn PDF document text
    • http://files.myindietrail.com/uploads/1/3/0/7/130739253/nosulalomipuriletu.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/1/0432/7964/6878/files/andersen_bajke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/edward_leedskalnin_magnetic_current.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/ac_market_pc_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/64603455617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/14748512725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/adjectif_pithte_et_attribut_exercices_cm1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1608/5916/files/41872924932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/kaleshwaram_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8769/9876/files/zekif.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 7

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_off0000826c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826C 5312 bytes
SHA-256: b216afcf39f5e1f0102c8108b07898b0b2443432e200a9470ed9a01fb4159f9c
font_01_sfnt_off0000945d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x945D 10580 bytes
SHA-256: 81c60c1984d55249efdc4fa614e1bba5cf57f2ff89b5fe0e276d3239d5297a42

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