Malicious PDF — malware analysis report

Static analysis result for SHA-256 79384cd34de21902…

MALICIOUS

PDF

41.7 KB Created: 2020-08-10 20:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d654aad81ca1e19f9c5723269179608f SHA-1: a121e0b40deca6fbd3a01a832fcc5bafa79a0329 SHA-256: 79384cd34de21902e93917100359c6b5a8d4bb1c89984bcbe8a94877e3b6cbd6
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure (ttraff.cc). The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's part of a link farm. The embedded URLs suggest an attempt to direct users to potentially harmful content or further download stages.

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=the+alternate+picking+improver+pdf+download
    • http://files.brightenthebrain.com/uploads/1/3/0/8/130874046/jogunodemuf.pdf
    • http://pateze.pennyquartet.com/uploads/1/3/0/9/130969329/3000684.pdf
    • http://files.oregonheritagehogs.com/uploads/1/3/1/0/131070212/tepofadipezosa.pdf
    • http://files.amsbandandchoir.com/uploads/1/3/1/8/131857540/6204815.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0443/6390/files/xolenilevodaneburipap.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/passive_entity_as_defined_in_chapter_171.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9753/files/portal_still_alive_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/8218/5893/files/old_ncert_ancient_history_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/15334815837.pdf
    • https://cdn.shopify.com/s/files/1/0435/9120/5021/files/arc_welding_machine_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0439/4074/1275/files/aboriginal_and_torres_strait_islander_education_kaye_price.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3770/files/byron_katie_books.pdf
    • https://cdn.shopify.com/s/files/1/0434/4614/1093/files/15980394714.pdf
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/ginobagupajajupokavamedid.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/54291569653.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8234/files/xaviwidebusejuxij.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_off0000644b.bin
5fbb636b39ae6e77cb5c0b5b575671bc1cea7cfe5defd3bb70ab73341a53dcd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644B 5556 bytes
font_01_sfnt_off00007714.bin
58cd9c8af6071f304c3aa1c969372251ddffcb77570e037afe53681b0ec60450		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7714 9980 bytes

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