Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7cc337463cc06df…

MALICIOUS

PDF

35.7 KB Created: 2020-08-06 19:35:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b748928efc5df663f430658799549db6 SHA-1: 409d5080cf69835a955f195a5e845fd2cc174c78 SHA-256: e7cc337463cc06df0bf79ac9521424d6f4406d4207913bba987af82399b8843c
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a high number of external links. One of these links, https://ttraff.com/pify?keyword=livre+assemblage+bois+pdf, points to a known malicious redirector. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it is not a legitimate document. The presence of numerous links, including a malicious one, indicates a likely attempt to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=livre+assemblage+bois+pdf
    • http://files.eileenheller.com/uploads/1/3/1/3/131398366/gubopixara.pdf
    • http://bifujet.anetagrygarova.com/uploads/1/3/0/7/130776445/semet.pdf
    • http://files.beasleycounselingservices.com/uploads/1/3/1/4/131438190/tutozotenerunas.pdf
    • http://files.newtreecenter.com/uploads/1/3/2/7/132740424/9055311.pdf
    • http://files.nutterscrossingcommunityhoa.com/uploads/1/3/1/8/131856234/tefebub_nemufosexonoj_tinanopuduvised_xagefabam.pdf
    • https://cdn.shopify.com/s/files/1/0430/3241/2311/files/50153690250.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/kaxalaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/cg_police_exam_date.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28068876324.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/44635360196.pdf
    • https://cdn.shopify.com/s/files/1/0434/3319/7718/files/wetabe.pdf
    • https://cdn.shopify.com/s/files/1/0429/4174/3263/files/dabesalajuvosisorun.pdf
    • https://cdn.shopify.com/s/files/1/0433/4003/8298/files/descriptive_adjectives_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/wufasi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3280/3488/files/download_any_video_from_any_site.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/pemamowusoger.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/80643272453.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9670/files/buduguvilate.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_off00004b9f.bin
6e4ec51c3aedb0f61f8bb6317e2ded95d07abc059b5ce223a8599395d8fb2a08
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B9F 5500 bytes
font_01_sfnt_off00005e45.bin
60f5db07d49d46edc6109d664b11d6d305ebd9b09d85876d260fbaf80ad9a898
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E45 10836 bytes