Malicious PDF — malware analysis report

Static analysis result for SHA-256 40fdd2f0b2a8f5a4…

MALICIOUS

PDF

49.0 KB Created: 2020-08-20 06:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9ec45b51974232715ea473380019d56 SHA-1: 9c0166fe1c5e281e77f8fb366c987d9ad7a163ab SHA-256: 40fdd2f0b2a8f5a4043c2f71a7b7cd483fb2bb944273fa3dc73c185c10be31fb
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links pointing to a redirector service and a link farm. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=angularjs+header+template', which is known to lead to malicious infrastructure. The document body contains obfuscated text and URLs, further supporting the malicious intent of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=angularjs+header+template
    • http://jekalusut.barbarahanks.com/uploads/1/3/2/6/132680839/9400a7ec4995eb.pdf
    • http://files.summitannarbor.com/uploads/1/3/2/6/132680827/xijawerijowino.pdf
    • http://files.pinkgorillaejuice.com/uploads/1/3/0/7/130738870/zukulubesijezem_waxaramag_redugakupavolet.pdf
    • http://gatufu.superiorfirstaid.ca/uploads/1/3/1/8/131858685/9943639.pdf
    • https://cdn.shopify.com/s/files/1/0432/2400/6820/files/math_worksheets_5th_graders.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2552/files/andres_oppenheimer_basta_de_historias.pdf
    • https://cdn.shopify.com/s/files/1/0431/9726/8128/files/90293799128.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/clasificacion_antibioticos_veterinaria.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/jumexegiderut.pdf
    • https://cdn.shopify.com/s/files/1/0437/0654/8377/files/gukikikezilew.pdf
    • https://cdn.shopify.com/s/files/1/0431/5434/2042/files/bringing_up_bebe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3391/0681/files/31159427084.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063b3.bin
9aa13096c9750694a08b860ce7e9c88ed012fec0898e46453d88c048cdef2c9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x63B3 5440 bytes
font_01_sfnt_off000075ff.bin
879e40fd9bc15b7a6e7a920335d744c588ef2b4ac890597bed99a66e96569410
pdf-font-stream PDF embedded font (sfnt) at offset 0x75FF 4644 bytes
font_02_sfnt_off0000871d.bin
3c72e6e979edbb42aaa479f34cbb66d122ae60433ae31d9f661d2f6c57aaa87f
pdf-font-stream PDF embedded font (sfnt) at offset 0x871D 15200 bytes