Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0925e8c1ad9d28…

MALICIOUS

PDF

48.9 KB Created: 2020-08-02 13:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c26810acbf2468c14cfb4d2ad47f07f8 SHA-1: eca80b35a97d2bbee5ef70a9e681ae31ed1e29df SHA-256: 0a0925e8c1ad9d2842aa3368a247814569683dbd6d7e7d3ab1d6dc093056f6ab
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is further obfuscated by a large number of embedded links, many of which are benign Shopify URLs. The document body, though heavily corrupted, contains the string 'Windows 7 telemetry updates' and the malicious URL, suggesting a lure for users. 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=windows+7+telemetry+updates
    • http://files.holygemstone.com/uploads/1/3/1/4/131455024/pemokorozo.pdf
    • http://files.schematherapycanberra.com.au/uploads/1/3/1/3/131378916/9999429.pdf
    • http://files.creep-o-ree.com/uploads/1/3/1/3/131380467/welimepanirezazixito.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/43769463760.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/38341257975.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/76757944834.pdf
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/93690104996.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1685/files/rokile.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5808/files/54348758766.pdf
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/calculus_for_scientists_and_engineers_multivariable.pdf
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/wewobizujewowezega.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/20238731557.pdf
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/dujekuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8515/files/fupimewifo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007237.bin
b99e393a01f1c7136a2f96d5c1e9bf020a372c012cacfe80dba2d6f8d2bffe67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7237 5272 bytes
font_01_sfnt_off00008422.bin
c0fec083cfa2f611d7db42302342b655ee76b458e59c13a64bcc2c728e6b1fc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8422 10692 bytes
font_02_sfnt_off0000a89b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA89B 4324 bytes

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