Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d9dde009879982…

MALICIOUS

PDF

48.1 KB Created: 2020-08-01 14:44:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae3b9b32cb268b564b33c0683386e89b SHA-1: 70f95b9cfe2c2738b2b17c9b448da1a6b3feae09 SHA-256: 79d9dde00987998291a6d098c3f708948ec6843cf42afe37e2468832d027811b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also present in the list of embedded links. This suggests the primary purpose is to redirect users to malicious sites, 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=train+sim+world+csx+heavy+haul+crack
    • http://files.medtechwearables.com/uploads/1/3/2/7/132740423/wefunimuzikiwipuro.pdf
    • http://files.duganspecialties.com/uploads/1/3/1/3/131398250/pulorijamaxav-kepar-zuboburewod.pdf
    • http://files.pecsaa.com/uploads/1/3/1/3/131384436/1095161.pdf
    • http://files.empowerptandwellness.com/uploads/1/3/0/8/130874169/nuvin_bakobalowelex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/timopugokoxigoge.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/41906171480.pdf
    • https://cdn.shopify.com/s/files/1/0428/4920/6439/files/jorujibifinedota.pdf
    • https://cdn.shopify.com/s/files/1/0427/9956/2911/files/wojavevibuzojo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/gakutekeluwuroxizasixi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/55178657153.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/60386608241.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevegijetowid.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/13683188573.pdf
    • https://cdn.shopify.com/s/files/1/0437/5176/8225/files/sipeniwixigasafaboles.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1793/files/64911531408.pdf
    • https://cdn.shopify.com/s/files/1/0438/2674/1405/files/49599018910.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_off00007b99.bin
62fbc84f9796f4159e43999cf215620a260ef04f66eaaa9252963ad17336938c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B99 5512 bytes
font_01_sfnt_off00008e46.bin
627266e1210a521f38bd38188ee06babbc612c1ed496974aba11be86745e3176
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E46 10928 bytes