Malicious PDF — malware analysis report

Static analysis result for SHA-256 71270422cb39bc99…

MALICIOUS

PDF

47.2 KB Created: 2020-08-18 22:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 149b678c7815525c20f9cd64db39e70c SHA-1: 773e519da2fda439dcbe7f9eed4467aaea59d204 SHA-256: 71270422cb39bc99fa3e97425cd5c4f11b149fdd815c5084039aa446d9353525
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector. The presence of multiple PDF links, many pointing to Shopify domains, suggests a link farm or SEO manipulation tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=ashcharyachakit+full+movie++480p
    • http://files.laurakramerlmhc.com/uploads/1/3/2/6/132695575/wovolagevikuzu.pdf
    • http://files.eldaag2019.com/uploads/1/3/2/6/132682627/4689018.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0433/4229/9295/files/94605118589.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0590/files/20090287927.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1562/files/gilofogudamuzarosozopi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/autotable_jspdf_cdn.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/27902009773.pdf
    • https://cdn.shopify.com/s/files/1/0438/2228/4960/files/spectrum_tv_guide_myrtle_beach.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/zubotipepana.pdf
    • https://cdn.shopify.com/s/files/1/0438/6881/5528/files/93918341981.pdf
    • https://cdn.shopify.com/s/files/1/0431/7796/7778/files/37284559294.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_off00006481.bin
e90697cfff456c3a2333ab7fa72cc008b367818417788048718ce6ddf931426e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6481 5892 bytes
font_01_sfnt_off00007878.bin
0ee369daa17393b2439e9a4a3b484bcd697cc40c1fddd85fb3572920177b18fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7878 10336 bytes
font_02_sfnt_off00009c00.bin
f3700bf99ab644efd5684713bd56e14d0b30b425f4234bd4096fdd9d258c1bd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C00 5484 bytes

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