Malicious PDF — malware analysis report

Static analysis result for SHA-256 301a215155749c86…

MALICIOUS

PDF

45.1 KB Created: 2020-08-19 02:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f11440a6a85b471b4d77d4f48217b763 SHA-1: 4363d7a27d2e37586b006fd352be1843e918e352 SHA-256: 301a215155749c86b2851f40abcb3966824b1435eefb52e3b183a03c1262ae8e
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 'https://ttraff.com/pify?keyword=collision+reporting+centre+sudbury'. Additionally, it features a large number of external PDF links, many hosted on Shopify, suggesting a link farm used for SEO poisoning or distributing further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector is sufficient to classify the attack pattern.

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=collision+reporting+centre+sudbury
    • http://files.letterstolawyers.com/uploads/1/3/1/4/131406781/ec1349a.pdf
    • http://files.cctreaty.org/uploads/1/3/0/7/130775032/6664680.pdf
    • http://files.atlantadentalanesthesia.com/uploads/1/3/1/4/131455883/najikenusapijevofifu.pdf
    • http://files.lizfinearts.com/uploads/1/3/1/6/131606598/4322990.pdf
    • https://cdn.shopify.com/s/files/1/0454/2994/8572/files/lipid_lowering_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0434/9424/4516/files/41032856633.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/pozazanuzolafutewavegel.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7577/files/40005811210.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/98378236334.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/water_pokemon_name.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/wivoxevuvijuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/57034657631.pdf
    • https://cdn.shopify.com/s/files/1/0434/8932/9312/files/accounting_journal.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9996/files/45883157213.pdf
    • https://cdn.shopify.com/s/files/1/0429/6799/0438/files/99171159986.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/casio_edifice_4334_manual.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_off0000637f.bin
a0f9bd2ad10d807d05ede6b858923689c24e139ec3294d8d380db9fee6d48f60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x637F 5180 bytes
font_01_sfnt_off0000752a.bin
5ddbdd0d631ee71d7083e8636fdbc5b23c3cfb69e723d5af5042a38daa4f2cfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752A 10644 bytes
font_02_sfnt_off00009958.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9958 4324 bytes

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