Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d2195b7d2edebc7…

MALICIOUS

PDF

46.9 KB Created: 2020-08-08 13:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 127996312e450d500b00319d4d147ef8 SHA-1: f8dcfe4dd5043f6ab9488a043c058131a84fb940 SHA-256: 7d2195b7d2edebc71ce7babdeece29dd4a2d1af49bb21b7a164dca311ba53556
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL is https://ttraff.ru/pify?keyword=artificial+intelligence+presentation+pdf+download, which is likely used to redirect the user to a malicious payload. The document body, though heavily obfuscated, contains references to the same malicious URL, reinforcing the phishing attempt.

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=artificial+intelligence+presentation+pdf+download
    • http://files.twofellersliveedgelumber.com/uploads/1/3/1/0/131071243/sepita.pdf
    • http://puzod.katehuffmanart.com/uploads/1/3/1/6/131606349/xifezuvelelox-bogova-jiguxoro.pdf
    • http://files.sandysfashionsformen.com/uploads/1/3/0/8/130814056/jazizafoboroz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/15164557248.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6680/files/18974522044.pdf
    • https://cdn.shopify.com/s/files/1/0436/4373/2126/files/xeloxuxupap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9467339244.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/dungeons_dragons_monster_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/famivonupetiwobalubaxag.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/80746782790.pdf
    • https://cdn.shopify.com/s/files/1/0429/2670/2755/files/80230016771.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/28617844601.pdf
    • https://cdn.shopify.com/s/files/1/0434/0154/3831/files/kioni_remote_desktop.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/rimezejipuvexakiri.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3447/files/61951143009.pdf
    • https://www.slideshare.net/Ac
    • 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_off00006c0b.bin
3c7c69236497833915ef6330188f0371a2da038e6438d2601939f9da355d0212		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0B 5192 bytes
font_01_sfnt_off00007dc5.bin
b0a73547e45e7774c860f962ff065d53b090bcb3a85da3e163ad287137f1abe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC5 10000 bytes
font_02_sfnt_off00009ff4.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF4 4324 bytes

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