Malicious PDF — malware analysis report

Static analysis result for SHA-256 535244c3d26e3021…

MALICIOUS

PDF

53.4 KB Created: 2020-08-21 19:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37bb3b68c5401c7e160877cec46fddb0 SHA-1: c7c5b001f4165ad52962c787a6ecc876491c911d SHA-256: 535244c3d26e3021005f706e6b6797435bed9c07dcf06751808f666336fccc9b
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one heuristic specifically identifying a malicious redirector. Another heuristic indicates a link farm, suggesting an attempt to distribute malicious content. The document body, though partially corrupted, contains text related to 'English paper format' and includes the malicious URL, likely as a lure to encourage clicks. The presence of a 'download button' heuristic further supports the social engineering aspect.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=english+paper+format+class+9
    • http://files.water-reckoning.net/uploads/1/3/2/7/132710621/371362.pdf
    • http://files.drjessica.ca/uploads/1/3/1/4/131438293/winutoka_gowelerujoka.pdf
    • http://files.debbiesangelsproductions.com/uploads/1/3/1/3/131382243/tixiz_matidigo.pdf
    • http://files.myrnaburksfineart.com/uploads/1/3/2/7/132710795/zokisajadixomo-famesu-gulako.pdf
    • http://files.leilasabet.com/uploads/1/3/1/4/131438397/kudorejinemike.pdf
    • https://cdn.shopify.com/s/files/1/0434/2772/5474/files/xevakutupupuxalep.pdf
    • https://cdn.shopify.com/s/files/1/0437/7296/9109/files/spin_selling.pdf
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/jadasasemetuxodozig.pdf
    • https://cdn.shopify.com/s/files/1/0437/0402/5243/files/essential_new_vegas_mods.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/75655475322.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1932/files/87101192763.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/wejokusawi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6925/0463/files/96099106359.pdf
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/tmux_swap_panes.pdf
    • https://cdn.shopify.com/s/files/1/0435/6803/8049/files/double_comparatives_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/tusabubu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000645d.bin
86f050f33c4a419f19ed005a4ff74f40f06a72194a2ed40312451eaf54622483		 pdf-font-stream PDF embedded font (sfnt) at offset 0x645D 5540 bytes
font_01_sfnt_off00007704.bin
de98c704958d69b69b74f4e6ad805b7760f7a7640cf650323a0894cacb7e2725		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7704 7144 bytes
font_02_sfnt_off00008b23.bin
b0894c2d8ca67c1fe579cac82cf675f1679f0db2aae539b29a0ff79d88c3ec7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B23 10376 bytes
font_03_sfnt_off0000aebc.bin
e6236245b1b519c90993a0a0decb83651aa70bd3eb3f1615240c4a875e4479e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEBC 17492 bytes

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