Malicious PDF — malware analysis report

Static analysis result for SHA-256 02af27f7ad83f09c…

MALICIOUS

PDF

41.4 KB Created: 2020-09-05 17:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99f68bbc25b8e6dbdb2e6eaf1dc8222c SHA-1: 222146a24f8006b4f460915b39a3a014a0978dca SHA-256: 02af27f7ad83f09c47fcace928fec0e330bc80bdcf29a83278332c8be3ed703b
154 Risk Score

Malware Insights

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

This PDF document contains a link farm and a primary redirector URL, indicating a phishing or scam attempt. The document body text, though partially corrupted, includes the phrase 'surprise birthday wishes for my girlfriend' and the malicious URL, suggesting a social engineering lure. The presence of numerous embedded links points to a SEO poisoning or link farm strategy to distribute malicious content.

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.club/wix?keyword=surprise+birthday+wishes+for+my+girlfriend
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/antivirus_free_quick_heal.pdf
    • https://cdn.shopify.com/s/files/1/0434/7602/5501/files/wine_cellar_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/taz_visual_overhaul.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/ketunowowaxogivewekef.pdf
    • https://static.usrfiles.com/ugd/b8c837_141f0f9e7f1e415c9ec98f0b51bc9b19.pdf
    • https://static.usrfiles.com/ugd/06497e_571f1018e3a341849799336c4e81bbed.pdf
    • https://static.usrfiles.com/ugd/d43733_c6c7582a6a564cd7a5b2c257a9bfd91f.pdf
    • https://static.usrfiles.com/ugd/4826f5_0a3412317ffe41bd8728e50983ebab71.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab96afde982e44ff8247b25864394a6b.pdf
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/95641626893.pdf
    • https://cdn.shopify.com/s/files/1/0466/2886/4165/files/36272440672.pdf
    • https://cdn.shopify.com/s/files/1/0438/1035/7405/files/gujagosuj.pdf
    • https://cdn.shopify.com/s/files/1/0427/9857/9879/files/spider_man_3_full_movie_in_tamil_download.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_off00006162.bin
bcc3db438b43299575404fb77482d6d2e05f365f78e34543b5ca2fbfae6778bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6162 5892 bytes
font_01_sfnt_off00007553.bin
c18cb065b2146046cf2ca3f785afaf39993c6faaf7987bfad50907c30335b9ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x7553 10584 bytes