Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f5baf8a7fe7264…

MALICIOUS

PDF

47.2 KB Created: 2020-08-29 02:56:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58e64ce2551b4ddc751a1b9605438178 SHA-1: f135ff7998f66f8a89b5e65efb7a86ad5f3939cf SHA-256: 63f5baf8a7fe726428d4d5b89ba1358c05cb05016b1f5dbf3099cfdf7d8db809
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically `https://ttraff.com/wix?keyword=sap+book+pdf`. The document body, though heavily obfuscated, contains references to this URL and appears to be a lure for users to click on malicious links. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute the 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.com/wix?keyword=sap+book+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/47568557484.pdf
    • https://cdn.shopify.com/s/files/1/0434/2589/0469/files/zuwibubaxuvezeketilun.pdf
    • https://cdn.shopify.com/s/files/1/0439/2402/9608/files/bandicam_free_full.pdf
    • https://static.usrfiles.com/ugd/b8c837_96eedea859fb4cba9c5132bc38469d66.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f8ef4fdabd7440c9452d65214075379.pdf
    • https://static.usrfiles.com/ugd/b8c837_35c6b513fa364f7789eabe2784f1ec77.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/64934179587.pdf
    • https://cdn.shopify.com/s/files/1/0433/8165/3655/files/gewipojelodep.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/8650371914.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/vehicle_dynamic_control_system.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/texediravuxexikofar.pdf
    • https://static.usrfiles.com/ugd/b8c837_1deed982071a48139a93912da9e86076.pdf
    • https://static.usrfiles.com/ugd/b8c837_73c664c97e174d22927fd525fd91700f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b139f2e832534566ba572c359f306460.pdf
    • https://static.usrfiles.com/ugd/b8c837_043578afc2d9490085c19e54584d56fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_dde419304cbb4662b01aaf2df702a87f.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007109.bin
8d467305052e50a90b009532f584258a482713f2d2ca876eaa1c220b8f7d40f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7109 4472 bytes
font_01_sfnt_off0000802f.bin
9392008a8927c564d11ea8750672e749c16fde10ba6b6673fa742531a03ea5dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x802F 10004 bytes
font_02_sfnt_off0000a25e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA25E 4324 bytes

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