Malicious PDF — malware analysis report

Static analysis result for SHA-256 9632f691b9a3d638…

MALICIOUS

PDF

55.2 KB Created: 2020-08-19 23:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3412bedfa1ff16ec180b869684196b2a SHA-1: 74fb4a39655885db4b259e6503a5264ae8612c7d SHA-256: 9632f691b9a3d638ad6af7948df892e4a3f77ebb034261adf4969d0282bb5464
152 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a redirector URL that includes a keyword suggesting a lure for 'obd2 scanner android apk'. This indicates a phishing or scam attempt. The presence of multiple Shopify links suggests an attempt to blend malicious links with seemingly benign ones. No scripts were extracted from this sample.

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=obd2+scanner+android+apk
    • http://files.creasyspeaks.com/uploads/1/3/2/8/132814476/626159.pdf
    • http://files.lisaramseyphotography.com/uploads/1/3/0/7/130739658/7732559.pdf
    • http://files.elsolpto.com/uploads/1/3/0/8/130874009/zafixikugizaxot.pdf
    • https://cdn.shopify.com/s/files/1/0431/3225/6407/files/webetiwumumasipar.pdf
    • https://cdn.shopify.com/s/files/1/0432/3996/4834/files/82313145262.pdf
    • https://cdn.shopify.com/s/files/1/0428/2354/9094/files/pavonikagewedovumolowuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/0543/6323/files/lewumir.pdf
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/gubirobimijepadatenadiz.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/72934309076.pdf
    • https://cdn.shopify.com/s/files/1/0433/9993/8211/files/the_official_scrabble_players_dictionary._download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/resij.pdf
    • https://cdn.shopify.com/s/files/1/0431/0073/3596/files/78868920158.pdf
    • https://cdn.shopify.com/s/files/1/0437/2611/0885/files/20723461605.pdf
    • https://cdn.shopify.com/s/files/1/0437/6743/1320/files/zakalevagelafadomu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/xaxolibilozitemeronuvi.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000652a.bin
abefece9cc936d065ea7a45740681a862d7456d36c76c2d7cbc104ee3d353f40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x652A 5108 bytes
font_01_sfnt_off0000766f.bin
8ad92e7977a5d88b6c6ac8584eff812a74d7f934774f4fc5ccc1f30199eb5a4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x766F 4012 bytes
font_02_sfnt_off0000864c.bin
616ea842c7c10a5fa72f858e2c5bdd9718bb3fc4a9f56c2ad76398dbae4e399a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x864C 10224 bytes
font_03_sfnt_off0000a96f.bin
b22b4203e99bebd9ec21885240fc680dd4ae7aae39de47f2541ea32bf055eea7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA96F 16384 bytes
font_04_sfnt_off0000bf98.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF98 4324 bytes

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