Malicious PDF — malware analysis report

Static analysis result for SHA-256 e501feaa60883a0e…

MALICIOUS

PDF

33.8 KB Created: 2020-08-08 17:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec381c9d667faf27661415f4e156e4d4 SHA-1: 62523cfbe78b6b0309f937e43b82f72cb80b8fda SHA-256: e501feaa60883a0eda0f60bcdf92a0a07d08a3f79a83df96a32c1c19cd3ecae1
154 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded links, particularly the one pointing to 'ttraff.cc', suggest a redirection to potentially malicious content. The document body itself appears to be obfuscated or corrupted, but the presence of numerous external links is the primary indicator of malicious intent, 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.cc/pify?keyword=parasitologia+humana+neves+pdf
    • http://files.trinahoadleyphotography.com/uploads/1/3/1/3/131379546/6a6a80a8e3e13b4.pdf
    • http://files.newellchristianschool.com/uploads/1/3/1/3/131380889/4aae5.pdf
    • http://files.carverarms.com/uploads/1/3/2/7/132740498/a28ec476.pdf
    • http://files.langsidechurch.org/uploads/1/3/1/4/131452817/da1e7f5bf0ae1dd.pdf
    • http://files.emotionalfreedomfacelift.net/uploads/1/3/0/8/130814611/defaxukavopewo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1272/files/tigapemege.pdf
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/double_arraylist_java.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5578033559.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/xisekuwa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5827/3183/files/cambridge_igcse_biology_workbook_answers_dave_hayward.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ridikesomuzumiburowafex.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3294/files/90647915151.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3574/files/red_guon_stone.pdf
    • https://cdn.shopify.com/s/files/1/0440/9376/7832/files/personal_pronouns_worksheet_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/draught_of_peace.pdf
    • https://cdn.shopify.com/s/files/1/0434/9201/6280/files/a_duie_pyle_blank_bol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5548/files/37458912192.pdf
    • https://cdn.shopify.com/s/files/1/0437/6369/5770/files/tenapuledanagebamajokeraw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000475f.bin
70ecabf7da6c585469ed470a4ab91f9be62cb874104c195d5bcaf331529d0c2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x475F 5516 bytes
font_01_sfnt_off000059f8.bin
d4667eb32c66d0bd3f10d19ec8d85e7eeaa7e3565d07404108bd29e2934b75ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F8 9748 bytes

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