Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c2b2f6c62817bd…

MALICIOUS

PDF

46.5 KB Created: 2020-10-28 22:26:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4006f128bc80a39df31081e69de5909 SHA-1: 76c9668997fbb6311a78ffcf5ed5e445159d01a7 SHA-256: d4c2b2f6c62817bd1869fcdfb84c067e986c95d5d799ad96f8d1696f86737f4b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', and also exhibits characteristics of a PDF link farm. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking PDF links, likely intended to mask the malicious one. The primary attack vector appears to be tricking the user into clicking the malicious link, leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/123?keyword=ford+oem+position+statements
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/13e50012-e691-4932-8e15-790498a90467/bikigubi.pdf
    • https://uploads.strikinglycdn.com/files/a1a2322d-4882-4cef-ad24-5668b01c31e6/99013935516.pdf
    • https://uploads.strikinglycdn.com/files/e062499b-9864-46aa-9c2b-69c3f828ecaa/75550275729.pdf
    • https://cdn.shopify.com/s/files/1/0483/7405/5063/files/les_nombrils_tome_8_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/k_cup_dimensions.pdf
    • https://uploads.strikinglycdn.com/files/edc09cf7-ab55-4372-ab3e-593a9b64b63d/85926687342.pdf
    • https://uploads.strikinglycdn.com/files/0352555f-6816-44f4-a2c6-3ddd9c19a3a9/5395914771.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8123/files/jutidepixopamed.pdf
    • https://cdn.shopify.com/s/files/1/0483/8693/2894/files/87221069502.pdf
    • https://uploads.strikinglycdn.com/files/1ab30747-4a34-47e7-b8e1-b85ec2fdb066/xowirusoza.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9335/files/100_verbos_regulares_en_ingls.pdf
    • https://uploads.strikinglycdn.com/files/4cf90708-a96d-4ee9-b619-5debd51d25b9/seales_de_transito_preventivas_y_su_significado.pdf
    • https://uploads.strikinglycdn.com/files/50f41b5c-1151-4eac-9955-9f2dd841bb94/dokipo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5952/8355/files/71332563784.pdf
    • https://s3.amazonaws.com/bivanud/67298579861.pdf
    • https://cdn.shopify.com/s/files/1/0483/8087/0805/files/woman_voice_translator_apk.pdf
    • https://s3.amazonaws.com/viromibukoleliw/78096791521.pdf
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/jefamuxuxeberejubeti.pdf
    • https://cdn.shopify.com/s/files/1/0497/8340/6754/files/zuzax.pdf
    • https://cdn.shopify.com/s/files/1/0432/6627/7534/files/rusty_bucket_nutrition_guide.pdf
    • https://cdn.shopify.com/s/files/1/0498/9403/1516/files/no_mans_sky_glyphs_reddit.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077c7.bin
5c71564bcbc7c7a16f1438e3a9f1bee27c9431876e1c3be29c9a157f97ba9b68
pdf-font-stream PDF embedded font (sfnt) at offset 0x77C7 5028 bytes
font_01_sfnt_off000088c8.bin
aebe65a397fb207b5f16dabc792bc6a0e16b295f8417c6f5b6345aff1f8de83f
pdf-font-stream PDF embedded font (sfnt) at offset 0x88C8 10624 bytes