Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1f657ff02a8d2d4…

MALICIOUS

PDF

59.0 KB Created: 2020-08-31 02:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28128606f5233de82cc9de0ab9bbc374 SHA-1: f09eba858cd729cc64139a0826563ced00037e40 SHA-256: a1f657ff02a8d2d4da7f15a0be7c2c58388db093b1cc3683d61790acba6a2b43
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that is disguised with a search query for 'Bismillah khan shehnai free download full'. This link, 'https://ttraff.cc/wix?keyword=bismillah+khan+shehnai+free+download+full', is the primary indicator of malicious intent. The PDF also contains a large number of external links, many pointing to Shopify, which is characteristic of SEO link farm techniques used to distribute malicious 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.cc/wix?keyword=bismillah+khan+shehnai+free+download+full
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/46929508749.pdf
    • https://cdn.shopify.com/s/files/1/0432/7319/1580/files/gudaxome.pdf
    • https://cdn.shopify.com/s/files/1/0428/5032/0543/files/leo_l._beranek_acoustics.pdf
    • https://cdn.shopify.com/s/files/1/0437/9652/9313/files/free_powerpoint_template_slide_carnival.pdf
    • https://cdn.shopify.com/s/files/1/0435/0876/0742/files/juvavosudaxofajijap.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/zerodha_algo_trading.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/sapotopikurudupanedejob.pdf
    • https://static.usrfiles.com/ugd/c0b427_2679cf241cd14ea5a97585380062c688.pdf
    • https://static.usrfiles.com/ugd/2074c9_ad0f713b5a8c45479c0d49550e40a776.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8ac8470e0cb42a2a898a88c7b77eccc.pdf
    • https://static.usrfiles.com/ugd/1a89c8_1f841f36a48141dc9bb094771a55a4c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_950f4480af9747f4ad58c4cec5241e0c.pdf
    • https://cdn.shopify.com/s/files/1/0439/9418/5886/files/16309300250.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/43885002021.pdf
    • https://cdn.shopify.com/s/files/1/0447/5315/8298/files/enlaces_de_carbono.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_off00009b69.bin
3feea32aaecd7d8e575c42452c7b68dadb83829778277e3f11f6ab713fdd92fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B69 5352 bytes
font_01_sfnt_off0000ad81.bin
ba87709e15fe5255b766b87217eb8100154698e907b512ca25a9f383277560e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD81 15972 bytes