Malicious PDF — malware analysis report

Static analysis result for SHA-256 b78a7269a6a66756…

MALICIOUS

PDF

43.1 KB Created: 2020-08-19 05:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 043718f4e7392e8d5c20c778acf5d846 SHA-1: ba6288e99728a2d9634a4cebc84828e9ef4c5729 SHA-256: b78a7269a6a66756f454731e03d1e1b7d15d6e8afe3b1e9db29a1da0ac5b9431
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm, indicating a probable SEO poisoning or phishing campaign. The primary malicious URL identified is https://ttraff.ru/pify?keyword=sql+server+non+clustered+index+insert+performance. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as a lure. The presence of numerous links, many pointing to benign Shopify domains but likely serving as a cover, suggests a broad distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=sql+server+non+clustered+index+insert+performance
    • http://files.cyndiaharlanfineart.com/uploads/1/3/0/8/130815213/804743.pdf
    • http://dipud.learntodriveinbc.com/uploads/1/3/0/7/130775643/1065355.pdf
    • http://fanos.heinrichshome.com/uploads/1/3/1/4/131483167/9129375.pdf
    • https://cdn.shopify.com/s/files/1/0437/7024/9374/files/76847196235.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2069/files/aristoteles_unam.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/magellan_gps_2000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7438/8119/files/sixuwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/verupigebesat.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2122/files/13413000684.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1866/files/pic_assembly_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/spring_framework_annotations.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0426/files/army_da_form_638.pdf
    • https://cdn.shopify.com/s/files/1/0428/3842/5767/files/wedavupimo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9590150980.pdf
    • https://cdn.shopify.com/s/files/1/0430/6003/5735/files/10292581866.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/sisalare.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_off00005ca0.bin
a150e8a52884b9ccdd30e0ec8662c71fb02e2426e615ca59ff26f5c9d891ce25
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA0 5540 bytes
font_01_sfnt_off00006f5a.bin
f1d281095d45293db7979038b190b4f80696bb95cb42c4e39ae2b0663cb8e470
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5A 9924 bytes
font_02_sfnt_off00009128.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9128 4324 bytes