Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd5cf7dbccbc7cb7…

MALICIOUS

PDF

41.2 KB Created: 2020-08-22 02:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ca13e8eb9619e4b7e942814d07c66f0 SHA-1: cc63b7e8290db3eb3dc2f5f1c0c0b1eb5caae118 SHA-256: dd5cf7dbccbc7cb75926742ec4e7483b84249d9180bbafed95fe86cef7e34636
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=associated+british+foods+annual+report+2009'. This URL is likely part of a phishing or social engineering campaign designed to trick users into downloading further malware. The document body also contains this URL and numerous other links to PDF files hosted on Shopify and other domains, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=associated+british+foods+annual+report+2009
    • http://xetirif.gtgchurch.org/uploads/1/3/0/7/130738894/2856263.pdf
    • http://files.flawlessdiamondstx.com/uploads/1/3/0/7/130775808/1343817.pdf
    • http://files.oliverootsllc.com/uploads/1/3/1/0/131070792/tidekufaw-vuxevuvam-finemawenududo-zorijovavarema.pdf
    • http://files.jonathancombsphotography.com/uploads/1/3/1/8/131871907/4647728.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/norodebewafizesaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/69113292362.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/3939999559.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4216/files/vefuwedojo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8438/1337/files/poenulus_plauto.pdf
    • https://cdn.shopify.com/s/files/1/0437/5396/3678/files/sale_of_business_asset_allocation_form.pdf
    • https://cdn.shopify.com/s/files/1/0459/6747/4855/files/41655564370.pdf
    • https://cdn.shopify.com/s/files/1/0432/6237/8152/files/numokelonabanuzofiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4817/3722/files/93721411407.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3651/files/96400902516.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/32522571213.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_off00005fef.bin
105754f4865d4128bedbefd379d404d6f83278b4512c11cbe48d99217143d20a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEF 5800 bytes
font_01_sfnt_off0000739d.bin
b6f761838120206d07ec8437b0baa386eb2b752da017a24cb62952394756a34d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x739D 10596 bytes

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