Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ca369b98f35416…

MALICIOUS

PDF

39.2 KB Created: 2020-08-19 03:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c8455c8aebaf118a578b21547aba552 SHA-1: 26b34d821947825f0939292755fcd468f397a346 SHA-256: e6ca369b98f354161fbca9099946dbc60f4aab6e39b3a0098ddac8bf8ce420e7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body and embedded URLs reveal a link farm strategy, with many links pointing to Shopify domains, but one critical link directs to 'ttraff.com'. This suggests an attempt to lure users through seemingly benign content to a malicious redirector.

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.com/pify?keyword=estimating+irrational+numbers+worksheet+answers
    • http://files.abrighton.com/uploads/1/3/0/8/130813855/1814459.pdf
    • http://files.thedirtyfeetdiary.com/uploads/1/3/1/1/131163846/gikususal.pdf
    • http://files.culturallyresponsivesustainedteaching.com/uploads/1/3/1/4/131454850/7603208.pdf
    • https://cdn.shopify.com/s/files/1/0432/8528/2980/files/camila_cabello_senorita.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/wewowejimaviregiravefinu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5127/6696/files/43532536274.pdf
    • https://cdn.shopify.com/s/files/1/0431/3923/5997/files/karudenuremadu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woburorofinuxup.pdf
    • https://cdn.shopify.com/s/files/1/0429/9695/7343/files/3760787653.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/drake_i_feel_blessed.pdf
    • https://cdn.shopify.com/s/files/1/0430/5285/9543/files/zegoxijirolafejakib.pdf
    • https://cdn.shopify.com/s/files/1/0440/6611/1638/files/ralph_sellers_chevrolet.pdf
    • https://cdn.shopify.com/s/files/1/0435/7701/6483/files/94277173555.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8890/files/laws_of_indices_worksheet_ks3.pdf
    • https://cdn.shopify.com/s/files/1/0428/4514/3206/files/al_quran_juz_20.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/6003/files/fazoxuxogowanuwa.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005970.bin
5f49d6bdeb6778632d1c36631f5924fac9db26f8e9dd1f45b44ad2dae2d760e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5970 5352 bytes
font_01_sfnt_off00006b89.bin
b6f466a8db0ae44e46852d7b8391d61c294f9c7eb5490c0206491a7e28c0fce7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B89 10612 bytes