Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb14acbe1c515e81…

MALICIOUS

PDF

39.5 KB Created: 2020-08-12 06:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e40a1ac1e1ea5fad7f3e6d24f25638b2 SHA-1: f78e30acd5a2bf221abb879d163d2990158c0b21 SHA-256: bb14acbe1c515e8180d6843e387d5bcec6c3770c93aeb6759162afe4c69bad92
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) that is known to host malicious content. The document body, though heavily obfuscated, contains references to the redirector URL and benign-looking PDF filenames, suggesting a lure to trick users into downloading malicious files. The presence of a visual download button heuristic further supports this phishing-like lure.

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.
  • 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
  • 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=ak+interactive+weathering+magazine+pdf
    • http://vibux.southcoastdesign.co.uk/uploads/1/3/1/3/131381464/bf98023e8c.pdf
    • http://nenapizet.girlexpocanada.com/uploads/1/3/2/6/132682051/towunijuji.pdf
    • http://files.dharmayogawheel.com/uploads/1/3/0/7/130775197/pekalebosov-doburutuwidunoj.pdf
    • http://files.youthultimateprogram.org/uploads/1/3/0/8/130814078/nozisobamijuxivepak.pdf
    • http://womixex.kenanleparc.com/uploads/1/3/2/7/132741555/nazeguf-kutiwozuxikevo-tomopa-bunaged.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6110/files/fefuje.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7232/files/58362155016.pdf
    • https://cdn.shopify.com/s/files/1/0433/9089/4247/files/avl_tree_implementation_java.pdf
    • https://cdn.shopify.com/s/files/1/0432/0532/9064/files/91651863017.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/functions_modeling_change_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/8086/8255/files/nopulufajupasixi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/3076371183.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/kijumevabugozavajiludam.pdf
    • https://cdn.shopify.com/s/files/1/0432/0310/0836/files/bingo_game_cards.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/jusikok.pdf
    • https://cdn.shopify.com/s/files/1/0434/6281/9990/files/13068479810.pdf
    • https://cdn.shopify.com/s/files/1/0431/3156/8277/files/consumer_purchase_decision_making_process.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_off00005a7c.bin
0c8654bd4917db9329808f2d4fd591463796a698f83cf55c35e96d814c8ac739
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7C 5612 bytes
font_01_sfnt_off00006d85.bin
0886b2d666664eb3709c2369e7c09ae5e24b2a22acfdb47fb517751d3f4a3a4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D85 10412 bytes