Malicious PDF — malware analysis report

Static analysis result for SHA-256 18ed22ead825849e…

MALICIOUS

PDF

51.6 KB Created: 2020-08-09 07:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4153c2b7a335f8bb28bce2a79632b156 SHA-1: 7341ddcb09327a455766d72e5c5c8481502304db SHA-256: 18ed22ead825849e82a08eb8f453a9b05eacaf31606276b4e98049f8afb5ea3e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, also contains the URL 'https://ttraff.com/pify?keyword=the+canon+s+yeoman+s+tale+pdf', suggesting a lure to external content. The presence of a link farm heuristic further supports the conclusion that this document is designed to drive traffic to potentially malicious 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=the+canon+s+yeoman+s+tale+pdf
    • http://vodal.sachdevwc.com/uploads/1/3/1/4/131437423/451088.pdf
    • http://files.noemiddleschool.net/uploads/1/3/1/4/131406780/9504701.pdf
    • http://files.zionkearney.com/uploads/1/3/0/7/130775462/lavilivinosegex.pdf
    • http://vurapoxu.mountainstreamchurch.com/uploads/1/3/1/6/131607163/pajonufogigisag.pdf
    • http://files.foosie.store/uploads/1/3/1/4/131437725/ragubezudabuj_wefuge_wukovap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/voxuritu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/95224884831.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/kibulewikemutovarokuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/8042/4351/files/buzulugefixob.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/payroll_accounting_system.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/rirezoxikinebatemufef.pdf
    • https://cdn.shopify.com/s/files/1/0451/4234/3833/files/les_adjectifs_numraux_cardinaux_et_ordinaux.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/62733946189.pdf
    • https://cdn.shopify.com/s/files/1/0432/5674/2046/files/xijotuxaxevofivelasoto.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6965/files/80760188869.pdf
    • https://cdn.shopify.com/s/files/1/0438/7130/5896/files/navalifalokemova.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12729031526.pdf
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/ruperusamesabumuzi.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_off00008ce8.bin
45c70052266c3e411b164d491586af7fab4c90e0c147c8acf40c64af17a1bb94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE8 5352 bytes
font_01_sfnt_off00009f05.bin
02788457e301b1332b3732a54ae0d92e8c8aaf04ff9cfe225e492301d7b5364c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F05 10076 bytes

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