Malicious PDF — malware analysis report

Static analysis result for SHA-256 02dcff3b7a0abed7…

MALICIOUS

PDF

42.5 KB Created: 2020-08-31 09:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44ef04ec888ffa53ae8c444c2a328f0c SHA-1: 1958ded54404406519613d13127e9ca1ebe142dd SHA-256: 02dcff3b7a0abed72792e2670bee1325801993871806d4b30b5a9927cef469ce
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to distribute malware or lead users to phishing sites. The document body and embedded links suggest a lure related to a game demo, but the actual content is obfuscated. The presence of numerous Shopify links, while many are benign, contributes to a link farm designed to manipulate search engine results, a common tactic for distributing 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.ru/wix?keyword=fnaf+1+demo
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5229/3541/files/free_gradebook_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3431/files/97248986538.pdf
    • https://cdn.shopify.com/s/files/1/0429/5370/3590/files/zejukovog.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0728/files/banevibasij.pdf
    • https://cdn.shopify.com/s/files/1/0436/4887/6702/files/gufiradujupalamud.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3969/files/jisamofopixenugakaruxife.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2298079133140999817f0eb7840f75a.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_6edc75832fdf4862a15377c2d2883489.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jatud.pdf
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/savixelu.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000843b.bin
d5d04f7fbe6a5fbf5d9952d5624a7985d8cc55ee32d5de9e609c7108b876b416
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x843B 17388 bytes
font_00_sfnt_off000053a2.bin
728b66bf1340dbbe30ec6ac0aa0a20470022fcc035db5d9f223ded029e546760
pdf-font-stream PDF embedded font (sfnt) at offset 0x53A2 4752 bytes
font_01_sfnt_off000063c9.bin
c38e5fd527e039a510f5cb1f76f093e3f76540e308fa6d2f7ce7829f8f642538
pdf-font-stream PDF embedded font (sfnt) at offset 0x63C9 9408 bytes