Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c764c9ad6dd115…

MALICIOUS

PDF

41.1 KB Created: 2020-08-14 05:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76b2e47d88e2b64e87985e15c2ce9de5 SHA-1: 69514f6d9f99f7b2215e726dd61c29f1920f1e36 SHA-256: 80c764c9ad6dd11542564f795911675fe7b3f7ea18bd6ea90d2d42d7317843fe
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'synonyms worksheets for 6th graders' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous external links, many pointing to Shopify, indicates a link farm designed to obscure the true destination. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.com/pify?keyword=synonyms+worksheets+for+6th+graders
    • http://files.outbackgreenhouse.com/uploads/1/3/1/4/131484133/583188.pdf
    • http://files.andressalazar505.com/uploads/1/3/2/6/132681164/f0f77.pdf
    • http://files.michigancelebraterecovery.com/uploads/1/3/2/6/132696122/fd437.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/counseling_skills_for_speech_language_pathologists_and_audiologists_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/strategic_management_calicut_university.pdf
    • https://cdn.shopify.com/s/files/1/0432/7365/0334/files/dieta_astringente_fisterra.pdf
    • https://cdn.shopify.com/s/files/1/0428/6090/4615/files/zapakamalutetidajojo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1260/1502/files/difference_between_cumulative_distribution_function_and.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8136/files/henri_cartier_bresson.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4685/files/pofiluvoninozam.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/10586729082.pdf
    • https://cdn.shopify.com/s/files/1/0455/6003/7541/files/nutritional_value_of_mango_fruit.pdf
    • https://cdn.shopify.com/s/files/1/0433/3964/5093/files/20693825190.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdf
    • https://cdn.shopify.com/s/files/1/0441/0313/9480/files/725510430.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8059/files/91297142094.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_off00006000.bin
0001e8c27870d8d4e6d6c467a2cdb0d4195fc5d8f3b3d0f186468e598ddd4495
pdf-font-stream PDF embedded font (sfnt) at offset 0x6000 5804 bytes
font_01_sfnt_off000073a1.bin
5484874fa0ae22f35c50246e22333b0107e87a3391d3888fbe0d284b1c0b7238
pdf-font-stream PDF embedded font (sfnt) at offset 0x73A1 10540 bytes