Malicious PDF — malware analysis report

Static analysis result for SHA-256 c378425d8975919d…

MALICIOUS

PDF

33.2 KB Created: 2020-08-02 18:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5ac04a7da195023b5be7c1f70fcb865 SHA-1: 4ea8b111075f47b08240d21dc2a7b8b6b9a06f9e SHA-256: c378425d8975919dfd06077834d3f2c6725cfe02cb5e626531d8c34a8c71c020
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document also features a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the redirector and the link farm indicates a malicious intent to lure users to harmful content.

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=hula+hoop+omi+lyrics
    • http://files.tylerdiscoverslife.com/uploads/1/3/1/8/131871622/bopukigigo_pabix.pdf
    • http://files.unnatilok.com/uploads/1/3/2/7/132741535/vejomidezuwux.pdf
    • http://files.northbuffalopresbyterian.com/uploads/1/3/2/7/132740241/6696251.pdf
    • https://cdn.shopify.com/s/files/1/0440/2456/1829/files/30352368641.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/74140729269.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8298/files/59428762857.pdf
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/lopizebekoloki.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/59001271573.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27039997465.pdf
    • https://cdn.shopify.com/s/files/1/0430/9080/4885/files/penaruzimewiduk.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1724/files/45633369415.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8909/files/81252125574.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8661/files/medogulo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7185/files/wetematezorolo.pdf
    • https://cdn.shopify.com/s/files/1/0436/5965/7374/files/78864527134.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_off000047c0.bin
cee571874028906960acc77befba47aea86baac665df5b4ef3256feb355de2e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x47C0 5236 bytes
font_01_sfnt_off0000596a.bin
4ca8d744f832b2e28f45bd844183a67a44e1522b5fa062fbea3117cbcd0e367f
pdf-font-stream PDF embedded font (sfnt) at offset 0x596A 9024 bytes