Malicious PDF — malware analysis report

Static analysis result for SHA-256 75bbc02e99e522fc…

MALICIOUS

PDF

51.0 KB Created: 2020-08-31 13:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5aa0a75cbcd54de95c5c68ded1905eec SHA-1: b7116b71562cecdf10bb59628da0d85191c5bbc9 SHA-256: 75bbc02e99e522fcd6fb1584f7e9379b6307814e622d6452441a53aaee56b9b7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of a large number of external PDF links, many of which are benign, indicates a potential SEO link farm used to disguise the malicious intent. No scripts were extracted, but the embedded URL is the main indicator of compromise.

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=beatmania+iidx+pc%25E4%25B8%258B%25E8%25BC%2589
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/89064d_28eea2847cba4058bdfc73bc160d6a9b.pdf
    • https://static.usrfiles.com/ugd/253000_283b1f97c53a47b79b43823d7a24f09b.pdf
    • https://static.usrfiles.com/ugd/b8c837_51b0f10196fc49fb995db2fd324f2de6.pdf
    • https://static.usrfiles.com/ugd/fe83c3_dd4b1ea6b2ba43f8af491909ada4e26e.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8554/files/litutiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/tbilisi_lonely_planet.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/tilenafinegunasadikazan.pdf
    • https://cdn.shopify.com/s/files/1/0433/4934/4421/files/aluminum_sheet_metal_thickness_metric.pdf
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/29255780751.pdf
    • https://cdn.shopify.com/s/files/1/0437/3974/2369/files/cattle_breeds_in_ethiopia.pdf
    • https://static.usrfiles.com/ugd/e23fbb_dd7a9489cdf34a7fbf393b900bf33abe.pdf
    • https://static.usrfiles.com/ugd/7dd30d_4511d89575c046859161afa94270e24d.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b1f.bin
1cdaf60f50ab991c1732159a061b05881077224330daf001ddcf629c23cb7bc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1F 5320 bytes
font_01_sfnt_off00007d52.bin
ffb7f878100c6381def04eb7f26975c0245954cae7749a2eaa4e47f0beec885c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D52 3312 bytes
font_02_sfnt_off00008902.bin
68a47f05b83655a6ed1855fa1307b50108090a3f8fc41b96a3993fb82976df4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8902 5032 bytes
font_03_sfnt_off00009a18.bin
4815efac89d085567176171f2ecc90f39098c4b457ecab5afc5d31c829b4e9f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A18 10212 bytes

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