Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f03ad545fd2254e…

MALICIOUS

PDF

43.3 KB Created: 2020-08-30 11:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0fafea09c1777bc05852d5d1d50aa5d SHA-1: e74e61152882ad2fa924dcade2f90afd80ac7c30 SHA-256: 1f03ad545fd2254e37ef1c0b708cfc45860ec399a9608b1a9717a078bef682d0
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying it as a malicious redirector. The document body, though partially corrupted, contains text related to 'Glock 26 slide parts kit' and a URL that aligns with the malicious redirector finding. The presence of numerous links, many pointing to Shopify, suggests an attempt to create a link farm for SEO manipulation or to obscure the malicious destination.

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/wix?keyword=glock+26+slide+parts+kit
    • https://cdn.shopify.com/s/files/1/0437/7142/9021/files/file_transfer_time_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0432/4022/6984/files/78018175058.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/rolikedojitemikoz.pdf
    • https://cdn.shopify.com/s/files/1/0462/4180/8535/files/flannel_crib_sheets_safe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4227/4471/files/niluxekavujafirakafuzej.pdf
    • https://cdn.shopify.com/s/files/1/0457/3167/6326/files/86781441764.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/minecraft_cracked_pc_offline.pdf
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/refubitulokitated.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5876/files/braveheart_movie_dual_audio.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/67791677231.pdf
    • https://cdn.shopify.com/s/files/1/0430/4414/3253/files/lurixutasapifirilem.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/rivow.pdf
    • https://static.usrfiles.com/ugd/f96b02_7b3f71af498a40ad918d7c68e692dd6b.pdf
    • https://static.usrfiles.com/ugd/b8c837_426e891f1dd64b5bae7b05d0f50b8888.pdf
    • https://static.usrfiles.com/ugd/15cd4d_ddbbe22fca2c4066820ac2b3a9113cf6.pdf
    • https://static.usrfiles.com/ugd/2c608b_8a1bd12d5cc740b58b8d8da405cebfcf.pdf
    • https://static.usrfiles.com/ugd/ed64d2_3eb9d60ce1dc40ee9f3a3354b46f99ab.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_off00005d90.bin
c516a0d710a441a3dd7e67208f0eaa3f3db6b4db98f0944725caa260e8c55521		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D90 5128 bytes
font_01_sfnt_off00006f11.bin
4e36b7053ddacb0c593e267e0e7a848fb171707ea8ea8cbe2f4e121c88a10c52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F11 10288 bytes
font_02_sfnt_off00009233.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9233 4324 bytes

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