Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a980f47a05288da…

MALICIOUS

PDF

56.8 KB Created: 2020-08-20 01:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f699135586edd1447faf9a3ec073f00 SHA-1: be376d21155548c39250293f5dbb0f5b84f9f71f SHA-256: 2a980f47a05288dad8c1073c35a97304ad2dd5d916b83e806d54c0604c2431fb
152 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 pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL and references a 'cheat sheet', suggesting a lure to entice users to click the malicious link.

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.ru/pify?keyword=wow+pet+battle+cheat+sheet
    • http://files.ousiafreediving.com/uploads/1/3/1/8/131871558/lozes.pdf
    • http://files.nanditabatheja.com/uploads/1/3/0/7/130739142/f6bf1c88a080ba.pdf
    • http://vuseredu.sandiegobestpartyrentals.com/uploads/1/3/0/7/130776819/4055680.pdf
    • http://mexulu.ovationentertainmentgroup.com/uploads/1/3/1/4/131407493/615def909ed3151.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/dosapasubom.pdf
    • https://cdn.shopify.com/s/files/1/0432/2761/1300/files/53794604838.pdf
    • https://cdn.shopify.com/s/files/1/0435/2232/6696/files/lulozoganesilal.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/ffxiv_fishing_leveling.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1585/files/85363855837.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6663/files/90342330480.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/spanish_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/48789005684.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/musigusuwekun.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/begripstoets_graad_6.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_off0000a063.bin
cbcce082f92b88ef67965a5c300b791d542aca2cb68a04ec6c1b4d0d60add849
pdf-font-stream PDF embedded font (sfnt) at offset 0xA063 5172 bytes
font_01_sfnt_off0000b208.bin
91a1e470c3130b063e6ec914d26e35ad5fe0a7a74a20d9b1630eddecc7f5d936
pdf-font-stream PDF embedded font (sfnt) at offset 0xB208 10764 bytes