Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eba0e2cc9f341aa…

MALICIOUS

PDF

33.5 KB Created: 2020-08-02 15:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1af83dc51589d7d1236033dbcfbfea9 SHA-1: 9cc74e4fc483c32e275c56bc908f30585373dc7f SHA-256: 0eba0e2cc9f341aa681419118f4e1c245f12ed9a586e7b0de5c032e945279d98
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged the document as malicious. The presence of numerous links, including one pointing to a known malicious redirector, suggests an attempt to lure users to malicious sites for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of malicious intent.

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=da+form+5840+r
    • http://files.purchaseofmanhattan.com/uploads/1/3/1/6/131637546/memezodere.pdf
    • http://files.ozgrav.org/uploads/1/3/1/4/131437862/vekepozeru.pdf
    • http://files.pghcru.org/uploads/1/3/2/6/132695301/zefobesumukusiwo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8326/7236/files/53940649286.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6093/files/tazovatubinefoxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9134/6079/files/kimagurujowalupo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0046/2503/files/xafewudenorizuvisijemalo.pdf
    • https://cdn.shopify.com/s/files/1/0440/9848/6424/files/9222067546.pdf
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/city_of_heroes_mastermind_macros.pdf
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/dotovakumij.pdf
    • https://cdn.shopify.com/s/files/1/0436/7548/4313/files/sizotumurusikuxuxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/biwaveko.pdf
    • https://cdn.shopify.com/s/files/1/0429/6740/0601/files/19109536098.pdf
    • https://cdn.shopify.com/s/files/1/0438/6609/5781/files/42491982425.pdf
    • https://cdn.shopify.com/s/files/1/0433/7863/8999/files/spongebob_text_generator.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_off00004644.bin
a9a19b5195fca0aac75880c647ad34a2a4b3cdb8fb2de94bd8359e68c5d6fa14
pdf-font-stream PDF embedded font (sfnt) at offset 0x4644 5252 bytes
font_01_sfnt_off0000581d.bin
1ffc428808c850d81ae616a2b667308570d9c416c12158996b431883f27a52e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x581D 9768 bytes