Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab83822c2c4083d3…

MALICIOUS

PDF

39.5 KB Created: 2020-08-16 22:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6325667f218ebe136d13638b6c9d7bb2 SHA-1: c9cbb76149b7bbf3f45de075a23a335a1a21d6cd SHA-256: ab83822c2c4083d3a8a7c9fe6059f011a29cbf8b7efd29128cc3bb1d7a7b41b2
128 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, which is disguised as a lure for 'accounts payable excel template free'. The document body, though heavily obfuscated, contains this URL and metadata indicating it was generated by wkhtmltopdf. The presence of a large number of embedded links, many pointing to Shopify domains, suggests a link farm designed to improve SEO for malicious content. The primary attack vector is likely a user clicking the malicious link within the document.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=accounts+payable+excel+template+free
    • http://rozukud.bluewaterfmchurch.com/uploads/1/3/0/7/130775997/0f6063e.pdf
    • http://lerodirow.sanctuaryinnerwear.com/uploads/1/3/1/4/131452841/bea429bf3.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/momakaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5217/0406/files/python_language_learning_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1534434062.pdf
    • https://cdn.shopify.com/s/files/1/0431/7885/2507/files/xojudixedijawafo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3950/5056/files/logical_reasoning_aptitude_questions.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7873/files/knowledge_base_template_confluence.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/82669341282.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/megawaxufuwebifododaranot.pdf
    • https://cdn.shopify.com/s/files/1/0434/4096/3750/files/popejupitosinoxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/buddha_story_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0437/5147/3303/files/exercices_sur_l_appareil_digestif.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/anita_moorjani_dying_to_be_me_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/1995/1513/files/tadabewajepu.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_off00005f24.bin
b5f6f536e80e09ab17644c07d67405c68eaaaedd9e6c3580e1eda495124818b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F24 5460 bytes
font_01_sfnt_off000071a9.bin
d8a31b343f32ece7b532af0c3175a741f890b4040a9781da6add8561ebe475c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x71A9 9184 bytes