Malicious PDF — malware analysis report

Static analysis result for SHA-256 a53e554e2f1b07c8…

MALICIOUS

PDF

72.6 KB Created: 2021-01-04 17:24:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8f6271718593e8f5b60a0bcf9a2bce23 SHA-1: 1f37bf1c7fe3ccbc2acc488330ea340556596491 SHA-256: a53e554e2f1b07c8c5bed7627f1463eebe5a623fc07fbdf52cfb832310175d57
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://traffmen.ru/123?utm_term=the+colony+episode+guide, is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated and unreadable, but the presence of the malicious link is sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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.
  • 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://traffmen.ru/123?utm_term=the+colony+episode+guide In PDF document text
    • https://cdn.sqhk.co/wozepefiga/4gbNhfE/85201479552.pdfIn PDF document text
    • https://cdn.sqhk.co/ranotigu/jijeXSu/dotimuzuxasupukezisumemiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/69cd4318-cec5-4de3-824e-977c1ca0f429/runima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca819f3-8885-4cfa-8ecf-0698482d1d51/15809511279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f811af6-d067-495b-95ff-e152955cc3e3/new_order_blue_monday_lyrics_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/147c30ea-836b-4f54-a4b6-d93205f4b25e/8526904606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a0a6b69-2d99-48d2-9356-bd0f794c8e61/legendary_game_of_heroes_protector_coins.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/1191915637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9d0e1e8-3ecc-4449-9e17-b67b944a98c8/smart_bracelet_app_set_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c195e009-6d0c-404b-abcd-57440070bf39/nexisilexesoxenefetu.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/asphalt_8_hack_free_for_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37119d8c-0389-4f1c-816f-d3ab3eb1ed5d/brother_cs_8072_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc2624c-8566-407e-bd9e-21cce630a07f/zesitezexi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE198 5080 bytes
SHA-256: ccbc771057cebfa48987ac666493dda5858749ed1f601b50100c4547a3b8f490
font_01_sfnt_off0000f2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F2 10212 bytes
SHA-256: a29d028bd42445c74a5c4ba38b176a4dfe70314b3532caa9c0c87542890f7b4a

Open this report in the interactive analyzer, or submit your own file for analysis.