Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ef7cd4f63915a6…

MALICIOUS

PDF

34.0 KB Created: 2020-08-23 01:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e31356d7672fb75f20d9d308a071b5c8 SHA-1: e4be9c10a585c7db3cf33b323b854e9078c2886f SHA-256: 37ef7cd4f63915a66f42dbe70e16b2a82df9d7a7044c5b738e6fb150d935f604
130 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=admin+law+agpalo+pdf'. Additionally, another critical heuristic indicates a PDF link farm, with 'https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88065476392.pdf' being the first URL in this farm. The document body, though heavily obfuscated, contains the same malicious URL. These findings suggest the primary goal is to redirect the user to a malicious site, likely for further exploitation or phishing.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=admin+law+agpalo+pdf
    • http://files.whistlingfrogresort.com/uploads/1/3/2/6/132681002/masaberilanimubaloji.pdf
    • http://siweb.carolmeadsart.com/uploads/1/3/1/4/131453960/40bac6d1884291b.pdf
    • http://files.albertsfamousmexicanhotsauce.com/uploads/1/3/1/4/131406258/85c0132160.pdf
    • http://files.seaofqihealing.com/uploads/1/3/2/6/132681783/465718c2f.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88065476392.pdf
    • https://cdn.shopify.com/s/files/1/0431/8252/2528/files/auberge_de_l_ill_illhaeusern_formule_jeune.pdf
    • https://cdn.shopify.com/s/files/1/0437/2060/5848/files/automatic_car_parking_system_project_abstract.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7829/files/bujodoga.pdf
    • https://cdn.shopify.com/s/files/1/0437/0061/7381/files/mimozadipedi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7680/files/wufajipomejijodulupija.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/8856256346.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/livemuniwuturapezujimugiw.pdf
    • https://cdn.shopify.com/s/files/1/0459/9601/5773/files/ff8_remaster_guide_book.pdf
    • https://cdn.shopify.com/s/files/1/0439/3664/5275/files/pukunaget.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_off00004810.bin
80db661b776ad0a6b102feb1619c137a5e58966711fc71feede022838dc1c781
pdf-font-stream PDF embedded font (sfnt) at offset 0x4810 5168 bytes
font_01_sfnt_off000059a4.bin
e66a9bde7db98d441462f3f084e83f574cf582339bdb948338f22f668cd2922f
pdf-font-stream PDF embedded font (sfnt) at offset 0x59A4 9992 bytes