Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ac776469433ac3…

MALICIOUS

PDF

47.5 KB Created: 2020-08-25 10:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c637761b91f9a796fcc717b083c0bd7 SHA-1: 4f5d7b0a81d95527e5e293aa8eabd36a52c6bd16 SHA-256: 32ac776469433ac3718e853389f2b15c71c9303c3dec9b1cc337a8b441a565d9
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.ru/pify?keyword=hypothesis+test+excel+template, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure under the guise of providing an Excel template.

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=hypothesis+test+excel+template
    • http://files.msilaser.com/uploads/1/3/1/4/131453499/78959.pdf
    • http://files.addressphonelist.com/uploads/1/3/1/6/131606284/8041f4f3fb11fef.pdf
    • http://files.quadslikehalie.net/uploads/1/3/2/6/132695651/wusuzi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/jesus_bleibet_meine_freude_klavier_noten.pdf
    • https://cdn.shopify.com/s/files/1/0438/1802/5117/files/lotivepug.pdf
    • https://cdn.shopify.com/s/files/1/0428/0808/2598/files/20102626134.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/log_and_antilog_table_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/6082/9087/files/2078644947.pdf
    • https://cdn.shopify.com/s/files/1/0432/2151/6448/files/53532919731.pdf
    • https://cdn.shopify.com/s/files/1/0463/1166/9917/files/chipmunks_shoes_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/0790/0835/files/65445177689.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/electrocardiograma_2019.pdf
    • https://cdn.shopify.com/s/files/1/0433/3898/9718/files/piano_arpeggios_chart.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/clinical_chemistry_marshall.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/ruvosukof.pdf
    • https://cdn.shopify.com/s/files/1/0448/4349/9677/files/formative_assessment_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/ctet_paper_1_syllabus_2020_download.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_off00007c04.bin
8643bf73304ad84c943b35c06c2f05a7838e3657487d2a768b31b90975322bae
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C04 5208 bytes
font_01_sfnt_off00008da5.bin
d2840b602fc57b0797838ab1bb778fb5352e8d94c0b297c457ce201eaeebf38d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA5 10460 bytes