Malicious PDF — malware analysis report

Static analysis result for SHA-256 64342c1b3cb53fe1…

MALICIOUS

PDF

44.4 KB Created: 2020-07-30 08:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8071e4a7a0685f3200ce55a86d8fc063 SHA-1: e9126268d5ee1f2c27d02c012d691ac896527011 SHA-256: 64342c1b3cb53fe11483d8dac0f5556ae06307d355e6fe4da9946d38071c51f8
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 pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the presence of numerous links suggests an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

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=monitoring+and+evaluation+tools+pdf
    • http://files.catholicartistconnection.com/uploads/1/3/0/7/130776298/lalaporutaraxi-lumumugafufewep-powipikoresun.pdf
    • http://files.bawainnovations.com/uploads/1/3/2/8/132814050/ludazoforisutu.pdf
    • http://files.beautyunderoneroof.com/uploads/1/3/1/1/131163898/9005567.pdf
    • http://files.splchampton.com/uploads/1/3/2/8/132814680/5031290.pdf
    • http://files.iowaiova.com/uploads/1/3/1/8/131856987/66dc91f5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/2846/2240/files/wevir.pdf
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/29387493392.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bijalikupuxamimidesedol.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6006/files/12477466277.pdf
    • https://cdn.shopify.com/s/files/1/0435/3422/1466/files/xesesigugefupomi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0696/6429/files/sakazufodu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/99737097978.pdf
    • https://cdn.shopify.com/s/files/1/0431/4827/9970/files/sidofezazafigewadi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/82281910885.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/31841454134.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_off00007048.bin
f3fc472442c1457bdf3ff5ec4512b2aef0cdf99e79191354de203792cbfb1704
pdf-font-stream PDF embedded font (sfnt) at offset 0x7048 5156 bytes
font_01_sfnt_off000081ec.bin
d08f79de36ae30dcbbe3a0d8634e1ac9d8f9deb1cf169a0b634e73b4886b2b76
pdf-font-stream PDF embedded font (sfnt) at offset 0x81EC 10092 bytes