Malicious PDF — malware analysis report

Static analysis result for SHA-256 9687d47768c70165…

MALICIOUS

PDF

50.2 KB Created: 2020-08-18 19:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 179d8e85e817a41dbec3303bbca3e8dc SHA-1: 1b5ce9aa5ce584311d44496ad1176fbcc413ebca SHA-256: 9687d47768c7016579f76aef89eb5b6013f9da11371c630554eb4dd7f3cc215c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL and keywords suggesting it's a lure for an annual report. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be social engineering via a deceptive document, leading to a malicious redirector.

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=imperial+tobacco+canada+limited+annual+report
    • http://jomez.worddreams.com/uploads/1/3/1/4/131408024/kusijodemaworavubusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8267/8433/files/menabokibawekeligofajib.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/mla_referencing_style_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/pdf_to_ms_word_converter_ocr.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5886/files/attu_movie_tamilrockers._gs.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6564/files/58633215843.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/29916186677.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56666804065.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0285/files/73275748227.pdf
    • https://cdn.shopify.com/s/files/1/0432/0729/5140/files/84626331231.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_off0000771f.bin
1e9f1074884439e007a8f5995abbf8b1f52bdd88203f658954d6336666ced2ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x771F 5000 bytes
font_01_sfnt_off000087ea.bin
a6f2740e7f389832b490620a516117d8c92d108056b304d97c072fa2507f59e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x87EA 11544 bytes
font_02_sfnt_off0000addc.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xADDC 4324 bytes