Malicious PDF — malware analysis report

Static analysis result for SHA-256 10333a5f2b654acb…

MALICIOUS

PDF

45.7 KB Created: 2020-08-22 02:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9744cf10f3891253e5d0a8de097d53c8 SHA-1: 3d9b4dd3b2dbb5767f5734c6f1faaeefc577ba00 SHA-256: 10333a5f2b654acba49829eedf51a7bac340b2ea67c55012706ba959bcd3624e
162 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 the URL https://ttraff.cc/pify. The document body also contains this URL along with numerous other links, many hosted on Shopify, suggesting a link farm designed to distribute malicious content or engage in SEO manipulation for illicit purposes. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bazaar+movie++filmywap+480p
    • http://pajefo.nowwwriters.ca/uploads/1/3/0/7/130739278/lofovoraza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9834/9471/files/nrcme_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/42982970582.pdf
    • https://cdn.shopify.com/s/files/1/0431/5647/1970/files/architektura_murator.pdf
    • https://cdn.shopify.com/s/files/1/0436/1116/0738/files/book_guided_reading_levels.pdf
    • https://cdn.shopify.com/s/files/1/0437/0399/2485/files/dogtooth_skirt_missguided.pdf
    • https://cdn.shopify.com/s/files/1/0437/1188/9562/files/tamigolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7078/3645/files/alabaster_girl_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4933/files/98692694479.pdf
    • https://cdn.shopify.com/s/files/1/0435/8746/9471/files/jilunoxixidunemasijuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/1772/2280/files/xufurowizege.pdf
    • https://cdn.shopify.com/s/files/1/0434/4446/9927/files/pic_background_eraser_app.pdf
    • https://cdn.shopify.com/s/files/1/0433/6559/7342/files/blob_file_type_for.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_off00005f9d.bin
853c61ab144d165cedcc2249e2763b015d0ecc7b7bd01656df669c202462ee66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9D 5644 bytes
font_01_sfnt_off000072e7.bin
f51de150b1a4befa7a0ef388c3400fd59ec52043a84236241eb72d8a0543c7c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E7 1980 bytes
font_02_sfnt_off00007bbe.bin
4f12fe9ff63ad56f53a524b5f25d0f6d277d0cf7f7d12f3083a54822ec54df81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBE 14944 bytes

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