Malicious PDF — malware analysis report

Static analysis result for SHA-256 89beb0034d999e5f…

MALICIOUS

PDF

45.2 KB Created: 2020-08-20 04:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5fdcd990b253c92d0ff6e82dbecf458 SHA-1: 2a358bf95579833b3f138ed83f1a92f46b85c91e SHA-256: 89beb0034d999e5ff037266706d0f6e48ba1595861eb7cd21243b645f2dc996d
154 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are hosted on Shopify and appear to be part of a link farm designed to improve SEO. One prominent link, 'https://ttraff.ru/pify?keyword=family+feud+fast+money+questions+and+answers', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly indicate a phishing or malware distribution attempt.

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/pify?keyword=family+feud+fast+money+questions+and+answers
    • http://files.truelightchristianschool.org/uploads/1/3/1/4/131437515/2624507.pdf
    • http://files.ricasbrainstormroom.com/uploads/1/3/0/7/130739369/wetegiwalijuvupomexi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0527/0427/files/argumentative_text_sample.pdf
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/girlfriends_guide_to_divorce_cast.pdf
    • https://cdn.shopify.com/s/files/1/0438/0190/3264/files/after_the_love_has_gone_piano.pdf
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/41469342251.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/76915466193.pdf
    • https://cdn.shopify.com/s/files/1/0430/5649/6791/files/70983603559.pdf
    • https://cdn.shopify.com/s/files/1/0448/4349/9677/files/applied_ballistics_for_long_range_shooting.pdf
    • https://cdn.shopify.com/s/files/1/0428/8980/5980/files/20693756257.pdf
    • https://cdn.shopify.com/s/files/1/0430/3103/6053/files/87395396083.pdf
    • https://cdn.shopify.com/s/files/1/0438/0747/3821/files/55605873812.pdf
    • https://cdn.shopify.com/s/files/1/0437/2814/2485/files/44125974434.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/serotonin_syndrome_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0438/7130/5896/files/16595155688.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_off00007312.bin
6b6f7ec3e18cff50591926bf9e275e4867962b15c079ca074a412b5a48ce9e9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7312 5328 bytes
font_01_sfnt_off00008532.bin
d38fcce95f5a128c5c11e669e39f827521d0c135888b270b0331bbb925e2242e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8532 9968 bytes

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