Malicious PDF — malware analysis report

Static analysis result for SHA-256 9272177eee1c07d2…

MALICIOUS

PDF

37.5 KB Created: 2020-08-04 13:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 835a36157be808e5276f69c69c1fc7c2 SHA-1: 971ee11ca34dde99c7d00e47828ed887ff62baac SHA-256: 9272177eee1c07d2f3933cdd9da2c738f4b06ce9a2fde1bbe1264b43443a8e6e
120 Risk Score

Malware Insights

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

This PDF document exhibits malicious behavior by acting as a link farm, directing users to numerous external URLs. One of these URLs, 'https://ttraff.ru/pify?keyword=epistaxis+pdf+otorrinolaringologia', is identified as a known malicious redirector. The document's structure and the high volume of embedded links suggest an attempt to obscure malicious destinations or engage in SEO poisoning tactics to attract unsuspecting users.

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=epistaxis+pdf+otorrinolaringologia
    • http://files.naifaidaho.org/uploads/1/3/0/7/130738548/lijurevo.pdf
    • http://files.literaryadventures.net/uploads/1/3/1/4/131438419/dakigujupumofusaf.pdf
    • http://lokagew.cccommunityscholarships.org/uploads/1/3/1/4/131454549/janulam.pdf
    • https://cdn.shopify.com/s/files/1/0437/8833/7303/files/balepotog.pdf
    • https://cdn.shopify.com/s/files/1/0430/8094/1729/files/tacoma_parts_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0435/7498/4863/files/nomodoxitog.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/2303571621.pdf
    • https://cdn.shopify.com/s/files/1/0428/2993/8855/files/lenamezumunubujipabibuwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0816/files/simplex_tableau_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0430/8792/1313/files/kepupazejoxole.pdf
    • https://cdn.shopify.com/s/files/1/0438/3368/8226/files/ballade_pour_adeline_piano_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/2008_dodge_avenger_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/vaxojolawaku.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/lopugi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/45923979747.pdf
    • https://cdn.shopify.com/s/files/1/0432/2987/2292/files/35798022198.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_off000054dc.bin
8cdc04d3a791f47898c0c2d80296b331d867d5ac488172496d5619dca4872cf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54DC 5232 bytes
font_01_sfnt_off000066c4.bin
57fd263fc6f20ccac0edc9e7164f2c6723eae22af7d935f5ae0854511f8ee75b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66C4 10144 bytes

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