Malicious PDF — malware analysis report

Static analysis result for SHA-256 20371ab0da85c2bd…

MALICIOUS

PDF

39.2 KB Created: 2020-08-10 10:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5673f1ba145819b906390c2f1ba376f3 SHA-1: a684e6b93d8fb6221acbd242f19e5a4f234cc689 SHA-256: 20371ab0da85c2bd6bc2c3b9d6e2a703dd180ff3e612233ef70eaecd7d1f53a2
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious URL, 'https://ttraff.cc/pify?keyword=anexar+pdf+ao+word', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to the URL, suggesting an attempt to lure users into clicking these links. The file's purpose appears to be the distribution of malicious content through these links.

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.cc/pify?keyword=anexar+pdf+ao+word
    • http://files.montanahphc.org/uploads/1/3/1/3/131384436/vaxigujemawad.pdf
    • http://files.friendsofkibbuse.org/uploads/1/3/1/4/131437532/6946f457b3ef464.pdf
    • http://files.azkillerbeessoftball.com/uploads/1/3/0/8/130874518/jemizip.pdf
    • http://files.globalvillageschool.org/uploads/1/3/2/7/132710780/kikebawaxopad-babibudox-vilemibefu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5287/6455/files/periril.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/vobafimotaxezobudu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48177964882.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/75431251248.pdf
    • https://cdn.shopify.com/s/files/1/0444/3809/3990/files/mergers_and_acquisitions_playbook.pdf
    • https://cdn.shopify.com/s/files/1/0437/3970/9605/files/16134686187.pdf
    • https://cdn.shopify.com/s/files/1/0436/4327/3369/files/63062742770.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/42542376834.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/76926669848.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xefafozerokadugatevaru.pdf
    • https://cdn.shopify.com/s/files/1/0434/4601/0022/files/68302782744.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/20523445773.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/futikuzazojexopuvenewipu.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/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fut

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c9b.bin
358a53456c7c8b6fafecf6ab180ea2703662039f3688bb48d2cdb89be16b26b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9B 4972 bytes
font_01_sfnt_off00006dad.bin
d6ae4e57211ed1aa44b7a44e3b9662d3794de909acfe839cf046fc24120676b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAD 10076 bytes