Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b34dbff0c64167…

MALICIOUS

PDF

41.4 KB Created: 2020-08-20 02:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf8d393b1cfbf11ec878b08dc9ceb243 SHA-1: b1b69d9c5141b42e9462aba0ecc25c11a9062ffa SHA-256: e2b34dbff0c64167817b25d3ddc2b97a3e07c09ede51b7f8923e40987566daad
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell T1059.003 Windows Command Shell

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors, indicating a phishing or malicious redirection attempt. The ML classifier also strongly flagged this PDF as malicious. The primary malicious URL identified is https://ttraff.ru/pify?keyword=osazone+formation+of+fructose, which is likely used to direct users to further malicious content.

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=osazone+formation+of+fructose
    • http://xifuz.mcaassociates.com/uploads/1/3/1/4/131453823/kalesovudon-bekazavokuj-wuwituvumodazo-jejija.pdf
    • http://files.ciremaitrail.com/uploads/1/3/0/7/130739978/bepapujilakomi.pdf
    • http://vugidaba.careertherapy4me.com/uploads/1/3/2/6/132682076/dudar.pdf
    • http://puzana.wardensworld.com/uploads/1/3/2/6/132680848/womowupad.pdf
    • https://cdn.shopify.com/s/files/1/0430/9234/4999/files/baxitisawax.pdf
    • https://cdn.shopify.com/s/files/1/0430/1222/7225/files/papipexikubepamulemunoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/82593089068.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/53324008443.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/13118612886.pdf
    • https://cdn.shopify.com/s/files/1/0437/0422/1849/files/37413584677.pdf
    • https://cdn.shopify.com/s/files/1/0433/6471/2599/files/biff_loman_in_death_of_a_salesman.pdf
    • https://cdn.shopify.com/s/files/1/0435/1344/6564/files/dobuwavazarexe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8126/9401/files/happy_birthday_song_punjabi_djpunjab.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/2002_pt_cruiser_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4491/2802/files/zifufedu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5679/8615/files/37037079060.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/57952139159.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_off000063d2.bin
126fff704fb86fa08d2a800abc67bee34a32f0cf303080bf0392a1decf5dadb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D2 5072 bytes
font_01_sfnt_off000074fe.bin
38b07310480a2fdf0d3ac2c077e206a5f24f4fc522beac503a11fca3cc0f28ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FE 10384 bytes

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