Malicious PDF — malware analysis report

Static analysis result for SHA-256 f394724e057cd955…

MALICIOUS

PDF

46.7 KB Created: 2020-08-07 19:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3a324bee6b0d3d60a9340f8d7feb9d8 SHA-1: 62b766f7e6c9e4a2895b8f51b73023a2f1c98f1b SHA-256: f394724e057cd955e5e83000bf7a54be808439cacf07f7c7c1bb93d5b54c7d20
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This URL is associated with a lure for game cheats, disguised as a PDF download. The document body, though heavily obfuscated, also contains the same suspicious URL, reinforcing the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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=gta+san+andreas+cheats+pdf+free+download+for+pc
    • http://files.mooremaker.com/uploads/1/3/2/8/132814342/1029549.pdf
    • http://files.mouseandmeco.com.au/uploads/1/3/0/9/130969146/bb6eb39.pdf
    • http://files.pldchoir.org/uploads/1/3/2/3/132302802/zajotomopewel_vafuvifulitepi_robixudoke.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/87118263300.pdf
    • https://cdn.shopify.com/s/files/1/0439/3569/5016/files/17935890853.pdf
    • https://cdn.shopify.com/s/files/1/0434/8549/5453/files/50880416867.pdf
    • https://cdn.shopify.com/s/files/1/0431/7587/0613/files/91374196304.pdf
    • https://cdn.shopify.com/s/files/1/0431/3487/7847/files/junuzemuvo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0072/files/90632496284.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6293/files/wow_vanilla_gm_commands.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/segetozirilonoxola.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/54662425940.pdf
    • https://cdn.shopify.com/s/files/1/0438/6773/4171/files/49645385776.pdf
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/40205530825.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/wuvebokakunawefasimilip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajotoliwafugesekediriw.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7495/files/6144709965.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069e7.bin
0729d7b540aafd0d3b7b40dd476d3bcfffe90605b4af939c726e96e201844def		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E7 5104 bytes
font_01_sfnt_off00007b4c.bin
057ef551be27f8d559225debb8bd894e12179eac0d47df99110ea42718156d8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4C 10652 bytes
font_02_sfnt_off00009fab.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FAB 4324 bytes

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