Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2845383cb35644…

MALICIOUS

PDF

44.0 KB Created: 2020-08-11 01:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b6145d4fdf496d03698185859b44f6e SHA-1: e9de1a7a070cfe110ac626fbb57e42126614bcad SHA-256: 6b2845383cb35644a71692a6652b02e8dc49629658e79555ba3f0561f9297a6e
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=rational+numbers+chart+pdf'. This URL is likely part of a phishing or scam campaign, attempting to lure users to malicious content. The document also contains a large number of external PDF links, many of which are hosted on suspicious domains, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users.

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.cc/pify?keyword=rational+numbers+chart+pdf
    • http://zabuzerom.sammactavish.ca/uploads/1/3/1/1/131164250/4fd74f13e.pdf
    • http://files.atomicgolf.club/uploads/1/3/1/4/131406659/xanevevixas_kefivadipe.pdf
    • http://files.evolvenowinc.com/uploads/1/3/1/3/131379277/7ea4fe873c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/13390923533.pdf
    • https://cdn.shopify.com/s/files/1/0429/6078/1475/files/edmund_spenser_sonnet_75.pdf
    • https://cdn.shopify.com/s/files/1/0435/4542/8122/files/nuvewideliluras.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3407/files/adobe_editing_text.pdf
    • https://cdn.shopify.com/s/files/1/0433/4505/1797/files/aviation_english_macmillan_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4374/files/rituxisamuvivosopez.pdf
    • https://cdn.shopify.com/s/files/1/0438/1124/2144/files/mad_crazy_love_line_dance.pdf
    • https://cdn.shopify.com/s/files/1/0436/1617/4237/files/nivuzadawidub.pdf
    • https://cdn.shopify.com/s/files/1/0431/9690/7678/files/77910652454.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fe6.bin
b5b7bc40ce099377edf4a05239b6ef0c483d4a39333672a0229b0ea39176965d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE6 5424 bytes
font_01_sfnt_off0000721f.bin
6b4851bc94d566236e483e5f5cbb3e2a30804fa0c9924f39404694f7d501127e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721F 10372 bytes
font_02_sfnt_off00009582.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9582 4324 bytes

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