Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b6972b0e8785ff…

MALICIOUS

PDF

57.7 KB Created: 2020-08-30 15:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da706149368d74c546bfdb41392e3417 SHA-1: 92809a9e69990bf88da11413f69d945c150397e4 SHA-256: 66b6972b0e8785fffa8738ef8d11b2e11c9ef9afdabae9c4f11f43724b97c48d
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a tactic to manipulate search engine results or distribute malicious content. The presence of the malicious redirector URL is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site.

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/wix?keyword=i%25C5%259F+g%25C3%25BC%25C3%25A7+enerji+konu+anlat%25C4%25B1m%25C4%25B1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0736/0667/files/avatar_comics_imbalance.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/58106053509.pdf
    • https://cdn.shopify.com/s/files/1/0433/8538/9221/files/32302446531.pdf
    • https://cdn.shopify.com/s/files/1/0437/2443/9704/files/pinguino_pac_cn120e_wifi.pdf
    • https://cdn.shopify.com/s/files/1/0457/0185/7436/files/17933696555.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e426ccd21b2404fab533c560bdb1fa1.pdf
    • https://static.usrfiles.com/ugd/b8c837_b89788869c5943fcbffa2295ffcc492d.pdf
    • https://static.usrfiles.com/ugd/b77b08_22944d5b59cf41e08174898960f5d0ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_56b804a908ab43a5a2669e288ce001d1.pdf
    • https://cdn.shopify.com/s/files/1/0428/4969/7959/files/werusosuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/2120/4631/files/sejolijetawetapalixinuza.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/pebusobokunoxovatapesibar.pdf
    • https://cdn.shopify.com/s/files/1/0432/8819/9328/files/84257066997.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8333/files/92797483215.pdf
    • https://cdn.shopify.com/s/files/1/0434/0852/3416/files/74270711002.pdf
    • https://cdn.shopify.com/s/files/1/0429/8830/6586/files/anemia_ferropenica_scielo.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071d2.bin
182720b37ea0ee31ba7968854a8a7399b9fbe0fa6a952e07692d2bc0f146efbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D2 5368 bytes
font_01_sfnt_off00008398.bin
72bc57c0457ebf7dc9739fec1cc54de770e15154677afaae4f6948469598440c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8398 2252 bytes
font_02_sfnt_off00008d01.bin
5b54256f6450c240d76959e883d102882137599fc4ef12900a8c04a280905ee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D01 12220 bytes
font_03_sfnt_off0000b348.bin
8fe31ac2096c5e11ca20e474ac9d4b0e624cd7c6a3d6648e58269b78a2b36287		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB348 16304 bytes
font_04_sfnt_off0000c8bd.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BD 4324 bytes

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