Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c018b5e69f2fdc0…

MALICIOUS

PDF

41.4 KB Created: 2020-07-27 09:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3025f3b73db9c25e9a7e8b94d9e35505 SHA-1: 329b95db3db9b55a1b59d7531c08b8b6fb47a78d SHA-256: 5c018b5e69f2fdc0ec54bf647e453e1d6a3374591e1fd8f80d634c1bf87b36b7
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to a device manual. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or to host further malicious content.

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.com/pify?keyword=airtv+2+manual
    • http://files.soulastro.com/uploads/1/3/1/6/131606901/6276169.pdf
    • http://files.cuttingedgepoodles.com/uploads/1/3/1/3/131380641/gazov_dolebito.pdf
    • http://files.dkgmd.org/uploads/1/3/0/7/130738822/b945810.pdf
    • http://files.brittanyrediger.com/uploads/1/3/1/4/131437306/c4b530f466fdb43.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6219/8425/files/mikopusosuku.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/fojatoditaxesuwubej.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/bufateziwuti.pdf
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/zezubuviroxogebej.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/62533147592.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/kekasovujalafafeluvikevaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78992801071.pdf
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/lagixedisub.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/29135165737.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/kofifogi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/negudusig.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_off000067c5.bin
86e8649e926cefe5e110f84127b1ececf1be2bf1f9da91b33e02f65abb27244c
pdf-font-stream PDF embedded font (sfnt) at offset 0x67C5 4488 bytes
font_01_sfnt_off000076cc.bin
332965898a81b3428b4b08055a6ff43ae2851cb7765f6960eed9e65c02c43d22
pdf-font-stream PDF embedded font (sfnt) at offset 0x76CC 10012 bytes