Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d029682cec8543…

MALICIOUS

PDF

40.9 KB Created: 2020-10-26 01:07:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a90fa22c6332baf95769e587b977ef6a SHA-1: 4ccac02b214e7f271b564630e43e7eca292188a9 SHA-256: a6d029682cec8543350abd8d2a488b73312a116b485f7c73d1a61f4d2d6e8c43
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous links, many of which point to redirector infrastructure. The primary lure appears to be a fake download for 'Adobe acrobat pdf pro apk', directing users to the malicious URL https://gettraff.ru/aws?keyword=adobe+acrobat+pdf+pro+apk. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to distribute malware or engage in phishing.

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://gettraff.ru/aws?keyword=adobe+acrobat+pdf+pro+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_5f910fa165deb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f874d1dd679d.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/15449ec5-87ae-4d9d-b95c-98e32c114a32/10.sC4B1nC4B1f_kimya_kitabC4B1_indir_meb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55f812b6-e8c1-4fe8-88b5-aeb75ff2e012/pepojuwetiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cbac428-bf31-42eb-b4ce-e583e384422f/46940196069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef5f2d15-e9fd-49c9-9939-59703c39ce91/fuzozafakedazam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b32dc8f0-4853-4042-93d9-bd84baec55d0/true_blood_season_7_episode_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9967/6060/files/schedule_d_instructions_2020_form_1040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8551/9767/files/55736260705.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/25436495373.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/domain_driven_design_reference.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/hymenolepis_nana.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/3203948065.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/5934519603.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/magumuxozakiwutibutojuf.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/nasezofepalofejipixumo.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 4

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_off000061e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E0 5132 bytes
SHA-256: 8c6f2a4040fc70e5302b52d663ff4d2edf8f17b9d61a8171273d3a76abb7722f
font_01_sfnt_off0000736e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x736E 11292 bytes
SHA-256: 90a580d966ee6e5d1412745d938aaba0e05520ad8463a3bd83970796bbc05b1a

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