Malicious PDF — malware analysis report

Static analysis result for SHA-256 094c515ba9ec97e3…

MALICIOUS

PDF

40.6 KB Created: 2020-08-16 22:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cda614b5ab8b2ce880e93703fc312df6 SHA-1: ebc07c48108de6f1f10c45897886f3c0e09264f4 SHA-256: 094c515ba9ec97e3e9bb90ebb4d93561632db1bc2941d99652a9851b39d93e74
154 Risk Score

Malware Insights

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

This PDF file contains a deceptive message about an 'Android auto encountered an error 16' error, which is a common lure to trick users into clicking malicious links. The primary malicious link identified is 'https://ttraff.ru/pify?keyword=android+auto+encountered+an+error+16', which is flagged as a known malicious redirector. The document also contains a large number of links to PDFs hosted on Shopify, likely for SEO manipulation or to appear more legitimate, though many of these are benign. The ML classifier strongly indicates maliciousness.

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=android+auto+encountered+an+error+16
    • http://files.ponderosaspecials.com/uploads/1/3/0/9/130969656/viditiwajavexim-waruwubibare-lumigiwep-tumutobox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/4586/1014/files/27168296990.pdf
    • https://cdn.shopify.com/s/files/1/0438/0616/3105/files/lm386_audio_amplifier_circuit.pdf
    • https://cdn.shopify.com/s/files/1/0447/0718/4793/files/a_modern_utopia_h_g_wells.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2101/files/best_android_phone_review_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/juvomujamageson.pdf
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/63439111576.pdf
    • https://cdn.shopify.com/s/files/1/0430/1514/3587/files/20531837869.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/31051581227.pdf
    • https://cdn.shopify.com/s/files/1/0439/0558/1211/files/learn_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0432/5628/3296/files/gogisegexum.pdf
    • https://cdn.shopify.com/s/files/1/0436/4877/8400/files/jubojotapolu.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_off00005fa6.bin
b8c28c3b0881c1a06fbf3a54abe1e825c5f384eba6b58476f6211f2a75f6dc0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA6 4920 bytes
font_01_sfnt_off00007068.bin
2d0c9439bab110d3279a57e8e49c17ba195abb97755419ecb018f9f94d980e6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7068 11248 bytes