Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b52f48c991b73a…

MALICIOUS

PDF

38.7 KB Created: 2020-08-30 05:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dad3962fb1d7897f0f698187260349a9 SHA-1: 2b9261b1f80a39a083b2315a9aaa2f47d54dbf0f SHA-256: 72b52f48c991b73a83499391f7a76b42e5fcbdefbc013e9d5c4a503bab2d9818
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, likely as a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.me, which is likely the primary malicious destination. The document body contains obfuscated text and URLs, suggesting an attempt to disguise the malicious intent. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a phishing or redirection attempt.

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.me/wix?keyword=5e+fighter+battlemaster+maneuvers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1088/2714/files/bullet_force_hack_apk_2018.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/basecamp_3_apk.pdf
    • https://cdn.shopify.com/s/files/1/0446/0707/8564/files/pairs_cricket_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/1283/2932/files/luxugonimefamalukagededu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0452/5720/files/xafemorifesilig.pdf
    • https://cdn.shopify.com/s/files/1/0431/4005/5208/files/nalenovixevowisud.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/69160353512.pdf
    • https://static.usrfiles.com/ugd/b8c837_a894cd18e3894dc983e88f1a3faf382e.pdf
    • https://static.usrfiles.com/ugd/8b97dd_3c82e71b7ebc44da8b21d91bb1578def.pdf
    • https://cdn.shopify.com/s/files/1/0437/5796/1374/files/cerita_pendek_anak_bergambar.pdf
    • https://cdn.shopify.com/s/files/1/0430/0754/1401/files/gebonegotavepafevela.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54058680795.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_off0000597c.bin
9eccf8a4d8683a48646ed4eab52c94daa64412545878633678f8631aa1ecfee8
pdf-font-stream PDF embedded font (sfnt) at offset 0x597C 5412 bytes
font_01_sfnt_off00006bc9.bin
f174431ca51bc31b0bade5671162b63491ab3f5e78b7c67421c22e4d73045b29
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC9 10112 bytes