Malicious PDF — malware analysis report

Static analysis result for SHA-256 d72350cd215a2e60…

MALICIOUS

PDF

41.9 KB Created: 2020-08-18 17:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62916bfde029827650672b768b494b2d SHA-1: 9ee9361d38e955cf419093773f83d100ef428381 SHA-256: d72350cd215a2e60e1e24e9d60ad04f29e47f5cd72c2b9ab5ecbad26ef8c4d61
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. The primary malicious URL, 'https://ttraff.ru/pify?keyword=poesias+cecilia+meireles+pdf', is directly linked to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to the poetry content and the malicious URL, suggesting a lure to drive traffic to malicious sites. The file was generated using wkhtmltopdf, a tool often abused for creating malicious PDFs.

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=poesias+cecilia+meireles+pdf
    • http://files.raggedmountainrunning.com/uploads/1/3/0/7/130776273/3ef5718.pdf
    • http://files.cecilyscloset.org/uploads/1/3/1/6/131607063/rusas.pdf
    • http://files.billiamscafe.com/uploads/1/3/2/6/132696598/5886895.pdf
    • https://cdn.shopify.com/s/files/1/0440/2036/7510/files/3962184233.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/govaxilo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0053/6986/files/57407576684.pdf
    • https://cdn.shopify.com/s/files/1/0437/3748/1365/files/xonarelivijira.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5650/files/14446841451.pdf
    • https://cdn.shopify.com/s/files/1/0444/2878/7878/files/bosch_security_keypad_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3627/files/blank_abn_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/deturo.pdf
    • https://cdn.shopify.com/s/files/1/0447/0826/6137/files/alphabtisation_des_adultes.pdf
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/sixesitodisewujola.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_off00006611.bin
0981ec460a0d190c70cb00a06ff624456cb36c9fcf5b326c88d1c408b09920b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6611 5300 bytes
font_01_sfnt_off000077fb.bin
e1d74e0a0bd753a7dc4c68213f396e9298f90b045365fe2b01f371f1c1038b17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77FB 10156 bytes

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