Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6fd128ee72cb0d4…

MALICIOUS

PDF

32.4 KB Created: 2020-08-18 13:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1032e47371cc158a4f1355d4daaf06c8 SHA-1: 64a02b628808d429cc9e4a20f2ee7a41784a4075 SHA-256: e6fd128ee72cb0d45594cd659813aa45c2f57a12b34169e549481e132f610445
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic identifying it as a link farm pointing to a malicious redirector. The primary malicious URL is https://ttraff.com/pify?keyword=volume+cuboid+worksheet+tes, which is likely used to obscure the final destination of the attack. While no scripts were extracted, the sheer volume of links and the use of a redirector strongly suggest a phishing or malware distribution 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.com/pify?keyword=volume+cuboid+worksheet+tes
    • http://files.placeworksdesign.com/uploads/1/3/1/3/131380889/lesafumisagokewu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6097/6021/files/motorola_mh230r_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/18463192422.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/walden_two_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1559/files/sonivekajugejo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4330/files/acls_instructor_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/4702/4805/files/garden_mania_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1581/files/jawuzitapupibimek.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/felutodefizafesusalifo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6726/0576/files/convert_mp4_to_mkv.pdf
    • https://cdn.shopify.com/s/files/1/0429/5730/8063/files/pisamuxafovox.pdf
    • https://cdn.shopify.com/s/files/1/0434/4102/9276/files/42499041664.pdf
    • https://cdn.shopify.com/s/files/1/0454/3918/9142/files/35879370939.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_off00004246.bin
ba980e8b92f5ca54841324b5c816974642c8629f01c2fdbcce29149902543f1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4246 5232 bytes
font_01_sfnt_off000053fb.bin
c11ba892e3b78aaf084994eefc0a95876bc79f627a718523f69c59dad3d3dec0
pdf-font-stream PDF embedded font (sfnt) at offset 0x53FB 9884 bytes