Malicious PDF — malware analysis report

Static analysis result for SHA-256 b406a6a1043906bd…

MALICIOUS

PDF

44.2 KB Created: 2020-08-18 21:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fc1444f85c328f28f8cb3526df5f983 SHA-1: 4fefa9ef68c9f1d50c1cbe3152686e9af30af98b SHA-256: b406a6a1043906bd56d3ccdee66a72b85656ac49486a661fbe25f8da54657239
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=online+cv+making+format' which is flagged as malicious. Additionally, a PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, with the first being 'https://cdn.shopify.com/s/files/1/0434/7514/0761/files/ontological_contextual_approach_to_teaching.pdf'. The overall pattern suggests a phishing or redirection attack.

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=online+cv+making+format
    • http://files.bdbooms.com/uploads/1/3/0/7/130738662/zutidivej.pdf
    • https://cdn.shopify.com/s/files/1/0434/7514/0761/files/ontological_contextual_approach_to_teaching.pdf
    • https://cdn.shopify.com/s/files/1/0434/4633/7703/files/konokexijiwalukusofilav.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/atharva_veda_in_english_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/3281139997.pdf
    • https://cdn.shopify.com/s/files/1/0437/1854/1480/files/classifying_numbers_chart.pdf
    • https://cdn.shopify.com/s/files/1/0435/0876/0742/files/alkaloid_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2478/files/gixofeku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/concrete_form_stakes.pdf
    • https://cdn.shopify.com/s/files/1/0434/7917/1222/files/82058279809.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/febet.pdf
    • https://cdn.shopify.com/s/files/1/0430/0262/6202/files/mental_illness_symptoms_checklist.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_off00006190.bin
aadeafa057a9a5b9bfd72e596af18375c72653af6d239fddc8dbd9b0f3f8ae9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6190 4960 bytes
font_01_sfnt_off00007263.bin
a86da30db2d34b9fa0c3724a7fb63c3172e004718e904e6bd93944e0c36861ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7263 10580 bytes
font_02_sfnt_off0000967d.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x967D 4324 bytes

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