Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e36b9f8c339779…

MALICIOUS

PDF

33.9 KB Created: 2020-07-31 18:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22366188fe0f146589caaf8043e330e1 SHA-1: b85a10c1bc2659cad1bebce0f236b8bebf94cf40 SHA-256: 70e36b9f8c339779aad865169bab9d5fb2c187679c8df78f404b7532b1a3492e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or content distribution network for malicious files. One prominent link, 'https://ttraff.ru/pify?keyword=tap+titans+2+diamonds', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, indicating an attempt to lure the user to click on it.

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/pify?keyword=tap+titans+2+diamonds
    • http://files.churchofbeethoven-oakpark.com/uploads/1/3/2/6/132695663/senikudo-dinagapazi.pdf
    • http://files.wetsunweekend.com/uploads/1/3/1/4/131454808/senog_tobis_zabunikapuno_gojijezujamat.pdf
    • http://files.musicmakersplymouth.com/uploads/1/3/0/7/130775387/e5d1300af65d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/93545787799.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/jagoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/60186728067.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/labebapebe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4058/7431/files/44454758499.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/58018183624.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1158/files/pojidadegovulebosumere.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/13628527552.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/vizotilexatezobixuti.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_off0000481c.bin
1e485b3755fe84d7c911ef0bc93106ce67412dfa67688f51ebcb905d9f5fc994
pdf-font-stream PDF embedded font (sfnt) at offset 0x481C 5060 bytes
font_01_sfnt_off00005940.bin
2fac4d0dcd184ba9759855308aa68fa9576f7070a7efb97a15b3051b0043e52b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5940 10016 bytes