Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce322c0ceb17d64…

MALICIOUS

PDF

67.2 KB Created: 2020-08-14 09:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 597322907f2ce18ec1757ed16923ccea SHA-1: 5c23d2c65eeab63a6e2f2001e63bca8589b6d452 SHA-256: 7ce322c0ceb17d644cad31c2dba19dfbd10b6c687624b015a3e7ab4f8f57cc11
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to what appears to be a link farm designed for SEO manipulation, with one critical link redirecting to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics as a malicious redirector. This suggests the primary goal is to redirect the user to malicious content, likely 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.cc/pify?keyword=new+horror+movies+2016
    • http://files.combslong.com/uploads/1/3/1/4/131409717/kegevizobikifix.pdf
    • http://xelatori.fritosport.com/uploads/1/3/1/6/131606490/1898116.pdf
    • http://files.chrismurraywheelworks.com/uploads/1/3/1/0/131070327/jatojolabigedifewe.pdf
    • http://tikimi.dmyoga.co.uk/uploads/1/3/1/8/131871395/6861a3940.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2323/5232/files/rimabumav.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7377/files/wbcs_optional_anthropology_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/divina_commedia_dante_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8088/4129/files/77739906993.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/22636077596.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/gixixamekekadatenegutaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60527157158.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9271/files/34417973211.pdf
    • https://cdn.shopify.com/s/files/1/0431/6607/2994/files/72171589722.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/97239762555.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/mizasunezitebaxutivabali.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/pidunosa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/sexajiraxuzebixedisiwet.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_off0000c9d4.bin
0c6a6e0bb4073a2f91e1bf5cf2a7fcebf4a65541b4ffd9525abe30c8a606fcd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D4 5284 bytes
font_01_sfnt_off0000dbd4.bin
060e4e93b061fee59cd3a5e9e5bcda39441194a0578227fd337b1499223d2871		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD4 10444 bytes

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