Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaab1916f9042d25…

MALICIOUS

PDF

43.9 KB Created: 2020-09-21 09:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 38663e6f1d95a33d237d4f29e6cc9e1f SHA-1: 85577af1eaa832d749abb5b40bb8f8a621d6f949 SHA-256: aaab1916f9042d25148943d4390521fc183c9f5772c059561867490d49101ec0
184 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'free robux' and embeds numerous links to external PDF files. One of these links points to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of a large number of external links suggests a link farm or SEO manipulation tactic, potentially to distribute further malware or phishing 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.me/wix?keyword=free+robux+generator+no+human+verification+or+survey+2020 In PDF document text
    • http://files.beckygrahamvoiceover.co.uk/uploads/1/3/1/3/131384604/mamajinekofeme.pdfIn PDF document text
    • http://mumujen.myroncotton.com/uploads/1/3/1/6/131636612/gonavojesawoluzet.pdfIn PDF document text
    • http://lafonenib.boonevillecoc.com/uploads/1/3/0/8/130874001/rukeke_mewozu_fuxezedepovo_pojotafeg.pdfIn PDF document text
    • http://files.nypeacefulvalley.com/uploads/1/3/0/7/130738917/9874e634.pdfIn PDF document text
    • http://files.hapbaileyhudec.com/uploads/1/3/1/4/131438071/7b8f0d2120fd82.pdfIn PDF document text
    • http://files.guidedexposure.com/uploads/1/3/1/3/131380728/82201.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://50fcb49b-c956-471a-9f7a-1cdf988f3cea.filesusr.com/ugd/7d2910_5ead001c7af34151980a989c65baf651.pdf?index=trueIn PDF document text
    • https://3888e63d-eef3-4858-b715-c7eacc1bf046.filesusr.com/ugd/501a20_97a82e8169a14c4581f1cd8b0b3baeb3.pdf?index=trueIn PDF document text
    • https://958c88e6-78ff-40df-9abc-4fb6995ab4ad.filesusr.com/ugd/b926a8_1b314d6c6b0a4435aa9f251bbd6bf96c.pdf?index=trueIn PDF document text
    • https://20b1f6af-f8b5-4d24-82cd-44ebe8a34205.filesusr.com/ugd/6a22cb_49e36d39131d4a80aff1d0ff988a851c.pdf?index=trueIn PDF document text
    • https://3f95a01a-7859-4c3a-9ae3-c4184fdccff6.filesusr.com/ugd/3f80ec_eb0e53e6b5ee47d8acaf965b73405883.pdf?index=trueIn PDF document text
    • https://ee792370-a14c-49c4-a0c8-2a72ee37b520.filesusr.com/ugd/4dd980_52ea482b58374ada86a803d0db8925e4.pdf?index=trueIn PDF document text
    • https://b359048d-d1c7-4652-b1ac-97509d74286b.filesusr.com/ugd/e6092c_47f67d67e1554922af95bc240d54cd7c.pdf?index=trueIn 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_off00006bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BED 5864 bytes
SHA-256: 2b495e57790126dd21180aecc33702f4f890c19b85810de4c57fc25ed0408db8
font_01_sfnt_off00007fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDD 10108 bytes
SHA-256: 97a98e7b1a46de4bcfc160f8337110affc3342650d9c64d0b3d238332271bfb0

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