Malicious PDF — malware analysis report

Static analysis result for SHA-256 89fbfac8442cb420…

MALICIOUS

PDF

40.2 KB Created: 2020-08-11 06:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1eb058b61e9f727222e20d03a661a1a SHA-1: 62eb0f05deee950870fc86c2a3aaa7f6ff70f6f2 SHA-256: 89fbfac8442cb420cbd07dc9ab2d5053ec52cb9e9a1fc0700c84aa2a16631261
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=ird+payment+slip+pdf'. This URL is presented as an 'IRD payment slip PDF' to entice users to click. The document also contains a link farm with numerous PDF links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content widely. The primary malicious IOC is the ttraff.ru redirector.

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.ru/pify?keyword=ird+payment+slip+pdf
    • http://files.jjsdka.org/uploads/1/3/0/9/130969819/98a098cf.pdf
    • http://files.spusdvisualarts.com/uploads/1/3/1/3/131398182/3e3ef6.pdf
    • http://files.faeriean.com/uploads/1/3/1/8/131871583/668721.pdf
    • https://cdn.shopify.com/s/files/1/0435/3097/7434/files/33160433701.pdf
    • https://cdn.shopify.com/s/files/1/0430/8218/6905/files/68188828093.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/vusewawufafufule.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/webagegokagifiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7975/files/tifaxos.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/2844313813.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5461/files/83567417687.pdf
    • https://cdn.shopify.com/s/files/1/0430/6993/1671/files/rediz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6912/8354/files/5068208736.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0269/files/surat_ar_rahman_dan_terjemahannya.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/dadebozodebisagovir.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0726/files/capital_budgeting_financial_management.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_off000051f4.bin
b34e8a883074f4530d7be0092b742b43fa41c0f26bd8ee8c81a187b50bc29598
pdf-font-stream PDF embedded font (sfnt) at offset 0x51F4 3828 bytes
font_01_sfnt_off00005f82.bin
38b85fef3a4edc1ae22eb2142c70c3166d6a4b1cd7bf973df377e6a596bd9466
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F82 5224 bytes
font_02_sfnt_off00007132.bin
a4fe343ad0efa701b7ab5edffebd2c90e6071817b13a6415803d3a5c4b930bcf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7132 10072 bytes