Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16493d576d6991c…

MALICIOUS

PDF

47.6 KB Created: 2020-08-02 23:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37070860df41d9d4e1ec280cdf84b2dc SHA-1: 37bc4136ec490083b7e500173fcd8e0fc98b4dc8 SHA-256: a16493d576d6991c1cab67485e46b5050728430f42826d775fdb2f82c6e1a4b8
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and references 'John Deere x585', suggesting a lure. The PDF also hosts a large number of links to other PDFs on Shopify domains, potentially as part of a link farm to improve search engine ranking for 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.com/pify?keyword=john+deere+x585
    • http://files.b-wise.guru/uploads/1/3/0/7/130775429/gegizizugasi-dolemeja-futorenona-pogeziveriwirav.pdf
    • http://files.planthespace.com/uploads/1/3/2/6/132695575/8453449.pdf
    • http://files.legacypolebuildings.com/uploads/1/3/2/6/132682076/9992270.pdf
    • http://files.mycosmicfox.com/uploads/1/3/2/7/132741352/wenodanalif.pdf
    • http://files.parislaserandskin.com/uploads/1/3/1/4/131452750/ropivebodepekixapuwo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6703/1200/files/fududuxevaxozewarug.pdf
    • https://cdn.shopify.com/s/files/1/0429/7195/5351/files/xazekenazawuditedapoje.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/kakotola.pdf
    • https://cdn.shopify.com/s/files/1/0431/9304/1053/files/30471940976.pdf
    • https://cdn.shopify.com/s/files/1/0435/9307/2808/files/sijapidiwebezamexotaxel.pdf
    • https://cdn.shopify.com/s/files/1/0439/4975/2478/files/paxezozetodepevetedo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9367/8497/files/vaxudilezalaxabu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/49981658997.pdf
    • https://cdn.shopify.com/s/files/1/0436/9137/6794/files/18205509134.pdf
    • https://cdn.shopify.com/s/files/1/0433/9456/4252/files/hustle_and_flow_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/2255167371.pdf
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/sosunin.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/11568380646.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3568/files/medutem.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
font_00_sfnt_off00006e1a.bin
7b6cd0accdd354a8237b5b58103fc396067514895c883bbb2842754217dbff68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1A 4528 bytes
font_01_sfnt_off00007d62.bin
b025f5f354d2ec1734941a8977b09d273d2a3591b977e6d2f310c321cdef553c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D62 10740 bytes
font_02_sfnt_off0000a218.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA218 4324 bytes

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