Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2d6bf64773218b…

MALICIOUS

PDF

35.8 KB Created: 2020-08-20 10:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9c5fe90acbfe508ab376576898db3cd SHA-1: 37dd53b80bf838aa2cbc4ee6b2c92fd2a0741c94 SHA-256: 0d2d6bf64773218b0decd6a54fa403067d9d02822a2940c0b967c086be640d2a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector at `ttraff.com`. The document body, though obfuscated, contains references to this redirector and other URLs, suggesting an attempt to lead the user to malicious content. The ML classifier also strongly indicated maliciousness.

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=fishing+report+on+bull+shoals+lake
    • http://files.taichischoolofgentleexercise.com/uploads/1/3/0/9/130969497/lewuwot-pugawe.pdf
    • http://pudel.divine-wellness.org/uploads/1/3/0/8/130874085/3356028.pdf
    • http://dareg.manuelaferretti.ch/uploads/1/3/1/4/131452890/81ec5aab82d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3057/6295/files/56819186687.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/xifoluwolamizama.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/52459627576.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5377/files/wilopimefifewigoz.pdf
    • https://cdn.shopify.com/s/files/1/0440/5372/5334/files/lange_pathophysiology_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5690/6918/files/japafinukevapuvomonomoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/20456274751.pdf
    • https://cdn.shopify.com/s/files/1/0428/5035/3318/files/58236570243.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/vunipezipez.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/junos_pulse_secure_vpn_client.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_off00004cf0.bin
061d6eac4f8957bf35d115ea8621e06aae9d324f04b5de5c6e8591007fa0bcbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CF0 5240 bytes
font_01_sfnt_off00005eaf.bin
ed317aa3a5f757defaa6c64e94b9a0ea920058deae3ff6f97972de5a10c90248
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAF 10608 bytes