Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3b096343b1b9dd…

MALICIOUS

PDF

65.8 KB Created: 2020-12-05 23:35:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 91bc52b73c7e2949a07ab76b4b3a33fd SHA-1: 9a136f5a1de92391fd7cf9382a32b6bacb6465c9 SHA-256: ad3b096343b1b9ddd4ded6ec10c17696edae7e3146b5a5e284e3e0e14c268e0f
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm designed for SEO manipulation, likely for phishing or malware distribution. The primary malicious URL identified is 'https://traffine.ru/aws?utm_term=trinetra+1991+songs'. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/aws?utm_term=trinetra+1991+songs In PDF document text
    • https://xawavefite.weebly.com/uploads/1/3/4/6/134667803/94efdfb5ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/6de32065-d343-4491-96b5-d0f214c7e580/rujimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15b202b6-058b-4119-a671-a2f40609dd61/jesidewoxoperaxog.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/83865382816.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/10163044274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22d54a8e-a9e7-4994-8e9d-d16e7aa03361/ame_no_mihashira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17446658-af2c-4a35-8c52-c1589e61ef09/mills_park_middle_school_logo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc1c731-8e4b-4442-8609-57aa709f4782/bostitch_flooring_stapler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/982ed380-a7bc-4c17-9266-77d463940959/7301556940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4286b011-6434-4068-8915-e5b30fb4cee1/rujaxedagizonowonimoboro.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/the_bastard_of_istanbul_full_book_free_download.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB796 4980 bytes
SHA-256: 5f96ce4d904fc2fe945e505a3ac6383ad99f76403709635e39c73173447e84fe
font_01_sfnt_off0000c89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC89A 11884 bytes
SHA-256: 563c24e182356dbdfe24f3e1a376103538514dcb65ee3ebdf694f8201edbf0a6
font_02_sfnt_off0000eff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF6 2552 bytes
SHA-256: 6f87b390aba9f6503f012bf29a81babd1e2865accd8c065fbc0f7c610659942e

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