Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b978aa42161b07f…

MALICIOUS

PDF

43.6 KB Created: 2020-08-31 06:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3adea578d0b8045ebb299ec92987e13 SHA-1: 85645ab516ff67811e8866ed0751c064876fd9bf SHA-256: 0b978aa42161b07f16f0b4b3e19b518b4651bb31be54fbe101ce4ae7623204d8
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to obscure the malicious destination. No scripts were extracted, but the overall pattern suggests a phishing attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=best+aquarium+games+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3467/3305/files/how_to_create_book_in_indesign.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/20800765776.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/10342639295.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/kebetidaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/17052873274.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/play_based_learning_activities.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/9991302640.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_78d515b8f0cd40118a1fe52876bb0b76.pdf
    • https://static.usrfiles.com/ugd/2813e2_af70497b4ca04adeadfe684ed683c7ff.pdf
    • https://cdn.shopify.com/s/files/1/0450/5288/7190/files/angiospermae_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0440/7748/2136/files/wopafitemamavojidupesig.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_off00006ad4.bin
a5b0cd293ec2c1b7a678be1aee5a04f6332541e2f187e4ae3f16148824b94472
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD4 5288 bytes
font_01_sfnt_off00007cae.bin
12bf495033a44bf1e9bddf2b87ed0b87d056aed3076aac1baab1afbbf281d86c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAE 10516 bytes