Malicious PDF — malware analysis report

Static analysis result for SHA-256 44eeecf90ca34d09…

MALICIOUS

PDF

49.2 KB Created: 2020-08-17 06:36:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4c27db81266c76f6de2979789f79ee9 SHA-1: 6edea11304105124393a1543e112acdd4e9bf1c3 SHA-256: 44eeecf90ca34d09616efa7ed68baf1b26ac2f2770ca7c2cdb719e861a0699dd
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific URL pointing to a known malicious redirector, disguised with a keyword related to simulation software. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting a phishing or scam 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.cc/pify?keyword=abaqus+simulation+software
    • http://files.fayettemaine.org/uploads/1/3/1/4/131483201/783b3c0.pdf
    • http://files.meltinyourmouthcupcakes.com/uploads/1/3/1/3/131379396/926221886.pdf
    • http://nokoguket.christismysaviorministries.org/uploads/1/3/1/6/131606457/5728673.pdf
    • http://files.mizzellesstandardpoodles.com/uploads/1/3/1/1/131164047/tifetov.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4540/files/xiguse.pdf
    • https://cdn.shopify.com/s/files/1/0429/3813/8783/files/40935582361.pdf
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/tube_digestif_de_la_vache.pdf
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/44029417531.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/supatomaxexipefiwe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6743/1320/files/zufikatajixezavogogera.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/63105790712.pdf
    • https://cdn.shopify.com/s/files/1/0433/3761/3461/files/6014405005.pdf
    • https://cdn.shopify.com/s/files/1/0428/7712/4774/files/92707340231.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/piwupiwib.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000730f.bin
e39ca47ac886fbb0550dd047d0e5ca5426de94978f0b4f12f746038de68010b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x730F 5144 bytes
font_01_sfnt_off00008481.bin
0248ceb40a229d75cab46d596dcdb3f4ece78a827c9b5e3a31557205a1669a3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8481 10876 bytes
font_02_sfnt_off0000a9b9.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9B9 4324 bytes