Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec95ef519043c545…

MALICIOUS

PDF

63.8 KB Created: 2020-07-28 18:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5793875d90e2404171d8b32b0190abe SHA-1: 77b6c4a3dbb0ac24647d7801c8134de1f2680eec SHA-256: ec95ef519043c545dcaf9e62cb1fb413a5a32d405847c755b686f031def5609f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, with the heuristic PDF_SEO_LINK_FARM indicating a link farm. One of the primary links, https://ttraff.com/pify?keyword=anjana+movie+all+song, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated, preventing a clear understanding of its direct user-facing purpose beyond the link farm.

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.com/pify?keyword=anjana+movie+all+song
    • http://files.caymanpensionwatch.com/uploads/1/3/2/3/132303235/kifasugug.pdf
    • http://files.simoncdrew.com/uploads/1/3/0/9/130969986/siliwekavegex_xarobug.pdf
    • http://files.joanneclarkephotography.com/uploads/1/3/2/6/132695633/powapowogawerul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56325204281.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9618/files/2717849214.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6899/files/92635319068.pdf
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/98962019139.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7621/files/24068063056.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/62392176599.pdf
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/lamebigoxapuwenazim.pdf
    • https://cdn.shopify.com/s/files/1/0440/3298/3205/files/katas.pdf
    • https://cdn.shopify.com/s/files/1/0432/2371/1903/files/24832289990.pdf
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/pufoxegomusanulewa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2699/7663/files/nomuwozoluwapitip.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/99004320227.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8912/files/jitewutuvufomego.pdf
    • https://cdn.shopify.com/s/files/1/0440/7368/1061/files/53651050401.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000913e.bin
99539ba10e0a95bceadc69b9bcb5d20f49906587095ba076efb815291de98ca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x913E 4744 bytes
font_01_sfnt_off0000a147.bin
7479f55bb203ee5cf0a6c483d3ed32996c64b5846ea3e5e8750b117354f3811c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA147 14816 bytes
font_02_sfnt_off0000cfdc.bin
b8f2835d739e2af431d8616a9e76f0508db318bc92766d3dc3900d5af4e2c45c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDC 16332 bytes
font_03_sfnt_off0000e5ef.bin
66eb9593117779c8ebcd7582deef50939815d89c3f644b19a84b8c64c1e27d72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EF 2800 bytes

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