Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cfdfe222059e78e…

MALICIOUS

PDF

37.4 KB Created: 2020-08-09 10:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a7d36e1af934fdcd29e87c6057f91ac SHA-1: 5e70331812c1b89b452abb4511238ad5cae1c5e2 SHA-256: 1cfdfe222059e78ee0729a6343f1912f0ca97c8ce0920f7c1342c3f89180d0a2
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the ultimate destination. The document body, though heavily corrupted, contains text related to 'business writing for dummies pdf free download' and the redirector URL, indicating a lure to download content. The presence of numerous links and the redirector strongly suggest an attempt to drive traffic to malicious infrastructure.

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.cc/pify?keyword=business+writing+for+dummies+pdf+free+download
    • http://files.cidercottage.com/uploads/1/3/1/3/131379059/sidasuzula_mopaku_gilafofivoj_titenilupo.pdf
    • http://files.glassfloatproject.com/uploads/1/3/1/4/131437513/477b90a.pdf
    • http://files.quantumpoint.org/uploads/1/3/0/8/130874031/fexurugomaseba_livorejalolokib_kuluvewowa.pdf
    • http://files.catherinegeras.com/uploads/1/3/0/8/130814172/adafb067ac3543.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/1997/files/important_constitutional_amendments.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/collocations_with_make_and_do_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/mepimidifadokolonu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9650/6521/files/ilmi_general_knowledge_capsule_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9075/6259/files/34907334427.pdf
    • https://cdn.shopify.com/s/files/1/0429/8217/8979/files/72199817117.pdf
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/acls_book_2015.pdf
    • https://cdn.shopify.com/s/files/1/0452/8862/0194/files/bhagavad_gita_quotes_in_tamil_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0441/0766/1464/files/lifutirusimili.pdf
    • https://cdn.shopify.com/s/files/1/0435/3366/4420/files/75381394324.pdf
    • https://cdn.shopify.com/s/files/1/0440/9524/2392/files/jixup.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/69247130210.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/titapanoxitakaga.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_off000052be.bin
6be7cb9b159ffd547f524ba1acafd1e344ac566fbc218d06b71c1ba97cf7a2fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x52BE 5504 bytes
font_01_sfnt_off00006571.bin
d0974a740154c109598822efb377d721b7f691f111b11ca3ce825dd0ae08a028
pdf-font-stream PDF embedded font (sfnt) at offset 0x6571 10428 bytes