Malicious PDF — malware analysis report

Static analysis result for SHA-256 18d20889488bfafd…

MALICIOUS

PDF

54.6 KB Created: 2020-07-28 16:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6eaa323682395032d77da55b61ead63a SHA-1: b7455f6deb05804b4d27197b25484eb4894b7e14 SHA-256: 18d20889488bfafd4e22debdc686587c32717a3b9ffa6151d0fe410340c7d045
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous links to other PDF files, likely for SEO manipulation or to distribute further malicious content. While no scripts were extracted, the presence of embedded URLs and the ML classifier's high confidence suggest a malicious intent to redirect users to harmful sites.

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=bootstrap+signup+page+templates+free
    • http://files.with-piper.com/uploads/1/3/0/8/130874025/wakafewuto-kirufolidenax-kewerijuvamujev-nazemu.pdf
    • http://files.olddominionhoundsponyclub.com/uploads/1/3/1/4/131438226/vowejavofe_ruvewo_gureguxelila_robodegupazog.pdf
    • http://files.highsandhellos.com/uploads/1/3/2/7/132740293/voxesolexetug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/12507023857.pdf
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/tezagixolekavo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/50255984672.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/72765545293.pdf
    • https://cdn.shopify.com/s/files/1/0439/9579/1518/files/9762215439.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/vedokenelutowonunisovad.pdf
    • https://cdn.shopify.com/s/files/1/0434/2962/6017/files/5524979559.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1188956193.pdf
    • https://cdn.shopify.com/s/files/1/0430/2028/8153/files/37774210400.pdf
    • https://cdn.shopify.com/s/files/1/0430/4879/6309/files/39287662895.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/54260642517.pdf
    • https://cdn.shopify.com/s/files/1/0433/6569/5638/files/66154890892.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099b5.bin
8d04812820e1428f84a3876f160b89640a790b169a520652e328ef401e721c8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99B5 5152 bytes
font_01_sfnt_off0000ab28.bin
154b17adc086110f68bc655661a42e5576a115155c58bc81af4bae807805e6a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB28 9984 bytes

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