Malicious PDF — malware analysis report

Static analysis result for SHA-256 149f475180c54ed1…

MALICIOUS

PDF

55.6 KB Created: 2020-08-20 09:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cfbcb2e77d5e67ee6f6d545d4e3c370 SHA-1: 221825d37bab2f062fcc40206297ede33c1e2d6e SHA-256: 149f475180c54ed10306f3220c7e71de7a3d1e8ee312be56773ebb570132af60
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a link farm or phishing attempt. The embedded content, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=custom+rom+apk', which is flagged as malicious. The presence of many Shopify links, some of which are benign, likely serves to obscure the malicious link or to appear more legitimate.

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=custom+rom+apk
    • http://files.jerrinchiu.com/uploads/1/3/1/3/131381374/jujonalibik-garadi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/sijifijalasupon.pdf
    • https://cdn.shopify.com/s/files/1/0428/5336/7975/files/33458518135.pdf
    • https://cdn.shopify.com/s/files/1/0432/4950/0315/files/bopiji.pdf
    • https://cdn.shopify.com/s/files/1/0437/8663/3374/files/vujuzopivikijupixenovim.pdf
    • https://cdn.shopify.com/s/files/1/0432/7600/9622/files/405516413.pdf
    • https://cdn.shopify.com/s/files/1/0436/7846/6201/files/1047106896.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/49378468841.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/20075240356.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/litigupemaguw.pdf
    • https://cdn.shopify.com/s/files/1/0436/8603/5621/files/dota_broodmother_guide.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006180.bin
a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6180 6440 bytes
font_01_sfnt_off00007174.bin
e637cb71d395bc1b2efe79225f02da5ce563676baf7690ef5fef1b09119ef0c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7174 4900 bytes
font_02_sfnt_off00008200.bin
aecc933578c88a4a0026d98ff72f9a4db1debada343779c99ba3a2fcacd7fc44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8200 2784 bytes
font_03_sfnt_off00008dca.bin
b626ea653457c07ba67bc2cdc85338c19dba7fa8478af7d2b349181133dad9b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCA 10412 bytes
font_04_sfnt_off0000b175.bin
3bc2ab189245217b388a6575843a0144944b665db3b398f3a66b67ce50bfe711		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB175 16876 bytes
font_05_sfnt_off0000c920.bin
5095ccdfdd328c3f25b1766e9c65bca58fa839170fcb9f3db3c20e130d955aff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC920 1736 bytes

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