Malicious PDF — malware analysis report

Static analysis result for SHA-256 afecdcc915649e1a…

MALICIOUS

PDF

47.0 KB Created: 2020-07-25 11:40:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1be868d6f7508bb072c65db38cb53b54 SHA-1: affb046e95df3b7722b017c543aa9c70e384decb SHA-256: afecdcc915649e1a6cab6af67fa94c56e9e9e245768c72f2b7416e1a441406bc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm used for SEO manipulation or to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector (ttraff.cc), suggesting the document is designed to redirect users to harmful content. The document body, though heavily obfuscated, contains keywords related to 'lease agreement template ireland', reinforcing the lure.

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=lease+agreement+template+ireland
    • http://files.momsfreeminute.com/uploads/1/3/1/4/131452935/xezuvugixekobixex.pdf
    • http://files.arcrestour.com/uploads/1/3/0/7/130775831/f0c9521e4.pdf
    • http://files.toaishow.org/uploads/1/3/1/3/131382955/denolekolidek-kofefuvudoga.pdf
    • http://files.alabamahunterjumpers.org/uploads/1/3/1/8/131856456/1764178.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/watemafuzubufoxevex.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5812/files/zezeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/7864865766.pdf
    • https://cdn.shopify.com/s/files/1/0436/6322/9078/files/74940084973.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xugufu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6999/7207/files/86223556529.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/gezukujaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/zokimoxotig.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/nuxusepumidof.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.pdf
    • https://cdn.shopify.com/s/files/1/0431/5178/6135/files/89519616695.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/18621954234.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_off00007d82.bin
e82078bbe6a8b2899621b7bca45a51c772178f4aa524fe0e5e5c27eb4989f737
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D82 4896 bytes
font_01_sfnt_off00008e00.bin
6f33d08a9a2736fa7d8666e6ede532041aae5d0ce037556330a61d1ba2e1f7f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E00 9532 bytes