Malicious PDF — malware analysis report

Static analysis result for SHA-256 72600967f2108d59…

MALICIOUS

PDF

41.8 KB Created: 2020-08-15 06:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b518e3f8b6b1664fc9dd9c8ea212cc5 SHA-1: 435d84b1e62f1a4cb87220fb119fc61a7556e949 SHA-256: 72600967f2108d59a3fe03d00001a6f9d29fe1bc1cef52b0a1143125fa8ae000
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs. Crucially, one link redirects to a known malicious domain, ttraff.cc, indicating a phishing or redirection attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact lure.

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=wpf+hierarchicaldatatemplate+treeview+example
    • http://files.bread-athome.com/uploads/1/3/0/7/130739916/tufidun_gutuloxovabubi.pdf
    • http://redosejuz.ekamniearth.com/uploads/1/3/1/3/131398020/zobizabur_lofexidupo.pdf
    • http://files.hrafricaconsulting.com/uploads/1/3/2/8/132814949/a7ba27d995c65.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8941/8657/files/17332399466.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/ing_direct_australia.pdf
    • https://cdn.shopify.com/s/files/1/0428/4681/4374/files/juroloretaveduju.pdf
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/ascom_telescope_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/xonikoresedupaxewojo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0045/3541/files/dasogakaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6093/files/kezuwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78299439052.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2111/files/rijomep.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1315/files/dekupusugeja.pdf
    • https://cdn.shopify.com/s/files/1/0429/2693/2124/files/buratikepaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/zebufolorafukonavef.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_off000057e4.bin
e0c8030c33aeaaebf49fdece80f76dc9568792e6d73f69ad1cf47abb5ef9d49a
pdf-font-stream PDF embedded font (sfnt) at offset 0x57E4 5452 bytes
font_01_sfnt_off00006a65.bin
51ebd97797d0f91a647f4e093959a6dd7bc9eaf55ff4da71d9fca43bff4f6a5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A65 14564 bytes