Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2212e767e35a741…

MALICIOUS

PDF

47.5 KB Created: 2020-08-13 22:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22906e58b740576fc80e64ae8bd8885b SHA-1: 390676919b0e626fcb60e6438d6ab8f7e939398a SHA-256: a2212e767e35a7413dfe1aa0ec84d8af97d478f3225c0d221d91ee9853a83a09
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is embedded within the document body and also appears in the list of extracted URLs. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a PDF link farm. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be social engineering via a link, likely leading to a phishing page or malware download.

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=weekly+calendar+google+sheets+template
    • http://tukiwo.michigannordicfirefestival.com/uploads/1/3/0/9/130969423/5092331.pdf
    • http://lanikagap.lrrbc.org/uploads/1/3/1/6/131636826/maxuvaginiliv.pdf
    • http://files.culinaryvacationsinc.com/uploads/1/3/2/7/132740467/gevadi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3929/3589/files/81173014592.pdf
    • https://cdn.shopify.com/s/files/1/0434/5053/1990/files/bafiri.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/riposulodobewamil.pdf
    • https://cdn.shopify.com/s/files/1/0439/1154/4987/files/beden_dili_kitab.pdf
    • https://cdn.shopify.com/s/files/1/0440/0129/6534/files/katuvibonukave.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19941062624.pdf
    • https://cdn.shopify.com/s/files/1/0449/5143/7480/files/mobile_application_architecture_design_and_development_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/rurus.pdf
    • https://cdn.shopify.com/s/files/1/0434/3139/5478/files/81254872555.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/64292181666.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/31033577164.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/navasefepag.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8892/files/70684963002.pdf
    • https://cdn.shopify.com/s/files/1/0433/8951/7973/files/83240448238.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_off00006e4c.bin
5f1d1dc15f43c654cc802744733596d32cfd87747dd649f87f527ce9e388e9e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4C 5404 bytes
font_01_sfnt_off0000808b.bin
370a63458a651ebaa8ec61f9e42812ef67208b48545b42bb82a30ea2922dd78c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x808B 9980 bytes
font_02_sfnt_off0000a2a7.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A7 4324 bytes

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