Malicious PDF — malware analysis report

Static analysis result for SHA-256 131e1a0ac6a97ef3…

MALICIOUS

PDF

61.6 KB Created: 2020-08-02 06:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa131b19be2b4c10b0e3c8304dafb1cb SHA-1: 1fcd33f06af7d71fd1d0f8dc76ad793a00716844 SHA-256: 131e1a0ac6a97ef3e46836f19c46aa3b5f8b1ae6a00cf040b4334bd8bc739682
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a link farm infrastructure designed to obscure the final destination. The primary redirector URL, https://ttraff.com/pify?keyword=object+thinking+david+west+pdf, is flagged as malicious. This suggests an attempt to lure users to malicious content, likely for phishing or malware distribution.

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=object+thinking+david+west+pdf
    • http://files.brickstoremuseumshop.org/uploads/1/3/0/8/130874238/327568677c6d646.pdf
    • http://files.jessicatookey.com/uploads/1/3/0/9/130969915/wizawumupemavut.pdf
    • http://files.appsusedparts.com/uploads/1/3/0/9/130969742/nanim-koxexawe-guladedi-fixujezow.pdf
    • http://files.nplwest.com/uploads/1/3/0/7/130775732/dezeziludumovujulof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/51212599304.pdf
    • https://cdn.shopify.com/s/files/1/0432/7427/2924/files/74529797878.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/tajitepalamevogiwunutal.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/90036951235.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/kesamakam.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5250/files/megoguxuwerobebifep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tiwimuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7831/files/25439014513.pdf
    • https://cdn.shopify.com/s/files/1/0429/8519/3621/files/94014275754.pdf
    • https://cdn.shopify.com/s/files/1/0437/0815/4008/files/moburobilisam.pdf
    • https://cdn.shopify.com/s/files/1/0430/4204/6103/files/zusogojutaza.pdf
    • https://cdn.shopify.com/s/files/1/0439/2806/0059/files/57071012746.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/gurobalabolirizazovifotu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0034/7299/files/zunubafewir.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006874.bin
8dd6efe7b6b581136c06632a60a29e27c890f0be8f3590c46d75b0f71f841da7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6874 20648 bytes
font_01_sfnt_off0000a943.bin
7b5b13b16312fddd972a62791adcb1a5a82bad1cbad83d3721e5efd801288d23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA943 5748 bytes
font_02_sfnt_off0000bcf0.bin
34bd1b31cb500f2fcb2aa1a2fd70cb4b7e0a9f66804e42589c3061f67399b6c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF0 13596 bytes

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