Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b16e1b7fec864e0…

MALICIOUS

PDF

41.8 KB Created: 2020-08-18 13:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 62f8668cf61481cdda6345407330a0bd SHA-1: 84f28d18433a8121f7da5f63aceeda71a882b5b4 SHA-256: 7b16e1b7fec864e052c5e9ce4a427723ad1ca4a2da288a50abacd7e22c0ccffe
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service designed to obscure the final malicious destination. The document body and heuristics indicate a lure related to 'bird houses osrs guide', likely a phishing attempt to drive traffic to the malicious URL. The presence of embedded links and the redirector strongly suggest an attempt to deliver a secondary payload or phish credentials.

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=bird+houses+osrs+guide In PDF document text
    • http://vukadenax.azzaziworkshop.com/uploads/1/3/1/4/131453177/vugirevebagikeje.pdfIn PDF document text
    • http://munoxamak.getbentzfarm.com/uploads/1/3/1/4/131436978/2052274.pdfIn PDF document text
    • http://vimekezo.goingawayguide.com/uploads/1/3/1/8/131860787/9146388.pdfIn PDF document text
    • http://famowe.michelbehrens.com/uploads/1/3/0/8/130813528/pexikurexa.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/1/0430/4781/3269/files/tezisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6628/5464/files/38717710464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4942/5823/files/differential_and_integral_calculus_formula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2837/2886/files/vuzowofegexuvip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2936/3878/files/spelling_bee_grade_3_word_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8462/7624/files/boond_boond_roy_audio_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0062/6325/files/xotijitisikitaril.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8434/8569/files/fobujinodumubarefaxep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/oblivion_sheet_music_flute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0697/5382/files/mijobotatevigemejoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3789/1487/files/84938490238.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 2

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_off0000675c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675C 4892 bytes
SHA-256: b728854b50ac87e9b0e2ae3dd01509b92256d4819fcbf3519727ce3b97222659
font_01_sfnt_off000077f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F6 10128 bytes
SHA-256: 5f534262a1c5b90fd27c321ce122461d0eb1e87ac33e8fa3ff9374183cbb40a4

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