Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0aa64906b606992…

MALICIOUS

PDF

38.5 KB Created: 2020-07-23 15:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8ea5cc64040b4126f7deb9add4336be SHA-1: 050f3ffcb3961e92d4325aec66c5cf6d580e62d2 SHA-256: e0aa64906b606992c6787ae4eb82acab7b1a97efaafccbea9b872e230908bf18
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used in conjunction with a SEO link farm strategy. The embedded URL is designed to lure users by referencing 'microbiology laboratory theory'. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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/wb?keyword=microbiology%20laboratory%20theory%20&%20application%20pdf
    • http://files.sophielebrecht.com/uploads/1/3/0/9/130969115/zuduzotedid.pdf
    • http://files.brooksidestable.com/uploads/1/3/1/4/131453784/8843467.pdf
    • http://files.somewhereelsewhere.com/uploads/1/3/1/4/131453945/c9fe2.pdf
    • http://files.galwaylocaltourist.com/uploads/1/3/0/7/130739119/xizudimuperapu.pdf
    • http://files.galwaylocaltourist.com/uploads/1/3/0/7/13
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tobilefoseparavako.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/vosixus.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/malibafasamotezubukaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/86566881040.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/2847269017.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/61255780520.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/83237551774.pdf
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/simozudilus.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5671/files/76668370413.pdf
    • https://cdn.shopify.com/s/files/1/0432/4913/9880/files/nepivuwol.pdf
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/lanad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/temufaxilagig.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5157/files/nevoribigos.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_off0000593c.bin
e136ac69e243a213a807ec69aca491c20f4ee1e3f5dda98b44f2c2f649121dbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x593C 4812 bytes
font_01_sfnt_off000069b7.bin
b1737ec7146ee930cbfc2c2e2ebe3485dd9cd6f15189e5e674acc7a22af6a026		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B7 9820 bytes

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