Malicious PDF — malware analysis report

Static analysis result for SHA-256 f63660bda5e53d57…

MALICIOUS

PDF

45.9 KB Created: 2020-08-27 18:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d76b0310ac4f7b7bfb63d6ebce267da6 SHA-1: 146561094589378e4e9644ced91a8bed931793f8 SHA-256: f63660bda5e53d57bb4f85315b79401f5d0c8af797a84e7d8bffd8928cc2d260
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links, with one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Apple time capsule' and a URL that appears to be part of a lure. The presence of a PDF link farm heuristic further suggests malicious intent to distribute links.

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=apple+time+capsule+a1409
    • http://files.uprisingstarsinc.org/uploads/1/3/1/3/131379045/gowofikur.pdf
    • https://cdn.shopify.com/s/files/1/0440/0427/8422/files/refurezoku.pdf
    • https://cdn.shopify.com/s/files/1/0460/1289/1297/files/mijurodudike.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/dazatiwukoxozafetarogul.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pelezegagujagemubejapo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/how_to_crack_software.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/achilles_tendonitis_rehab.pdf
    • https://cdn.shopify.com/s/files/1/0457/7686/3398/files/mansions_of_madness_2nd_edition_wiki.pdf
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/30742897730.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/aba_english_course.pdf
    • https://cdn.shopify.com/s/files/1/0432/7358/4793/files/farmacos_anticoagulantes.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/depipubapojegijap.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/
    • https://cdn.shopify.com/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ed0.bin
e904a7ca422e19bee371d2a2cdd55ba26787914dacb4ee291dc48d5f34405a6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED0 5412 bytes
font_01_sfnt_off0000812a.bin
b2acb415b5d8a2a26bb5ce72ffaced0ce3bd65d5cb15008c4bad377deccbf36b
pdf-font-stream PDF embedded font (sfnt) at offset 0x812A 12900 bytes