Malicious PDF — malware analysis report

Static analysis result for SHA-256 6542b7dd6f2a251d…

MALICIOUS

PDF

39.5 KB Created: 2020-08-22 13:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed20d72d7d92295ced55dadf8e22ff49 SHA-1: aa3765867c57242fe6c678556f4f985eb0cc5d50 SHA-256: 6542b7dd6f2a251dd299b5a196a5945c1b107f2cdf95e75cf89a944bcfa8d1a0
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a link farm designed to host numerous PDFs. The primary malicious link, 'https://ttraff.cc/pify?keyword=showbox+android+apk+smart+tv', is a known redirector. The document body, though heavily obfuscated, contains references to this malicious URL and other benign-looking PDFs hosted on Shopify, suggesting a lure to download potentially 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.cc/pify?keyword=showbox+android+apk+smart+tv
    • http://files.pdlphotography.com/uploads/1/3/2/8/132814241/zizusigonoxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.pdf
    • https://cdn.shopify.com/s/files/1/0440/7328/7830/files/38322905764.pdf
    • https://cdn.shopify.com/s/files/1/0435/6335/2227/files/82395698256.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/80925519590.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/princeton_review_psat_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/3830/1594/files/22833903486.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9308/files/isomers_of_alkenes.pdf
    • https://cdn.shopify.com/s/files/1/0429/7320/0537/files/aadhar_card_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/3920/3229/files/77551111452.pdf
    • https://cdn.shopify.com/s/files/1/0428/9799/7991/files/39156322775.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/57945066504.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_off00005b2d.bin
95cb154cd244459bab3b39a9343bec894af9934a4aa4aee35626e300677a86fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2D 5696 bytes
font_01_sfnt_off00006e68.bin
31154847fa19a8122e3db8b2d56ec362e2aeb2b0deb9a8a1d3c2d10e056650b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E68 10360 bytes