Malicious PDF — malware analysis report

Static analysis result for SHA-256 57026156644131ac…

MALICIOUS

PDF

43.2 KB Created: 2020-08-21 22:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 07f0e54a07402e77f4f95c005f79fd59 SHA-1: cadaf95e30243b13968cf5c7d6b19e5d7836ff28 SHA-256: 57026156644131ac7730951e75035c6815d762a654a24e18e228bc98b6e64de2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to mimic search engine results, directing users to a malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the lure text "1998 bayliner 2855 ciera owners manual" and the malicious URL. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm for SEO poisoning.

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.ru/pify?keyword=1998+bayliner+2855+ciera+owners+manual In PDF document text
    • http://files.nickysawesomewebsite.com/uploads/1/3/0/9/130969775/sotasoxaturenukaji.pdfIn PDF document text
    • http://files.combslong.com/uploads/1/3/2/6/132695874/9637149.pdfIn PDF document text
    • http://files.thecaricatureentertainment.com/uploads/1/3/0/8/130874115/0dfc0.pdfIn PDF document text
    • http://puxavoge.lesdamesontario.org/uploads/1/3/1/4/131454207/mimapopo.pdfIn PDF document text
    • http://dojilami.mpsplumbingandtraining.com/uploads/1/3/0/7/130776433/975ccd1558dec0e.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/1/0432/4684/6119/files/35280494478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/32009118446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4121/6929/files/dowonava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8956/6623/files/buvesabom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/6690/1924/files/jozesewukumidesose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8508/4310/files/c_string_to_double.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2089/3864/files/free_audio_books_quora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7434/5365/files/89730229471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/6304480283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6618/6135/files/pro_forma_adjusted_ebitda_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/69062236028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/rosewugexiwovefudeturare.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_off00005eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAB 5840 bytes
SHA-256: 6517d714b606813678300153c01208d1cbd8fcd78f50fca2f41edc2c378c275c
font_01_sfnt_off00007283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7283 14564 bytes
SHA-256: 35ff76117fd0fc5d9eb92d315a92e052751075fea3ea1dd1a47286cb011d58e6

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