Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca7eda1d2a0b660…

MALICIOUS

PDF

54.2 KB Created: 2020-08-19 02:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61d8cd459f1dd0a3979efa83723dc4d3 SHA-1: 238c6a105041fea5c49cb6ea86549e26a115c413 SHA-256: 8ca7eda1d2a0b6608309fa6a78b4faf47a9a84adb3c0725dc1f9c50aafff37cc
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the URL that triggers the redirector, indicating a lure for users interested in 'best games for android'.

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.cc/pify?keyword=best+games+for+android++apk
    • http://files.wgct.org/uploads/1/3/0/8/130813427/pojusanozomi-finadunefaf.pdf
    • http://files.cassowaryfestival.com/uploads/1/3/2/8/132814250/161fb0.pdf
    • http://zasefixi.freezerlink.com/uploads/1/3/2/3/132302921/50850.pdf
    • http://files.muslimahcommunitygroup.com/uploads/1/3/1/6/131606666/d32f7.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulexukiwogefera.pdf
    • https://cdn.shopify.com/s/files/1/0439/0633/4888/files/minelimoreg.pdf
    • https://cdn.shopify.com/s/files/1/0433/8185/0268/files/95863335712.pdf
    • https://cdn.shopify.com/s/files/1/0447/9841/0918/files/97119177837.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/rozosibojazido.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/the_economist_style_guide_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/jawamoguvur.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0321/files/42809354136.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8672/files/mawawevizulolukuvixidepa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2660/4447/files/xikelokareto.pdf
    • https://cdn.shopify.com/s/files/1/0434/2900/3416/files/42863273517.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
stream_005_off0000a570.bin
b4aaae62bbcee564f59159e0a3480f7099ab87e23225c433ca584ca983c9aed5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA570 21672 bytes
font_00_sfnt_off00006ffe.bin
078f5d2412277c5cdfc4a764e223c86b69f80cf4dbd416c741dc54cd6aa5852d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFE 5440 bytes
font_01_sfnt_off00008272.bin
589c3d826918e6b3a7e639f5a7ec8f44296209b8eec02cb5ae8342dcb3fcc477		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8272 10224 bytes

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