Malicious PDF — malware analysis report

Static analysis result for SHA-256 05de41db911f9d68…

MALICIOUS

PDF

38.0 KB Created: 2020-08-28 20:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d06d0883e29f0a4febb02c102d940cc7 SHA-1: 78a821cc88adb02815ed594c84013411e534913a SHA-256: 05de41db911f9d68942ceaa844abbdccf79f7da96a3614a69b09e1535db9bb19
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector, indicating an attempt to lead the user to malicious content. The document body, though heavily obfuscated, contains keywords related to a user manual, likely a lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the malicious redirector.

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=logitech+harmony+650+remote+user+man
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3886/6597/files/85019823355.pdf
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/subilotakimevazuru.pdf
    • https://cdn.shopify.com/s/files/1/0435/5581/5583/files/19642040718.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6555/files/famekagezup.pdf
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/aakash_aiats_question_paper_medical.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/lazugefalewoworesen.pdf
    • https://cdn.shopify.com/s/files/1/0429/3722/1276/files/68397659292.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/juxupajajivamuwiri.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/paises_y_nacionalidades_en_frances.pdf
    • https://cdn.shopify.com/s/files/1/0462/6851/4453/files/monster_hunter_world_character_creat.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/feliz_navidad_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/4437/0594/files/58211638184.pdf
    • https://cdn.shopify.com/s/files/1/0433/8404/5719/files/sulezawovidurojalijibedeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/64626941621.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wevanedinuwisuvajolow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9642/5119/files/bosafiviloketutexuwozoba.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/assets_and_liabilities_format_in_kannada.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005652.bin
9ee6d49738ee707d2184437cbee1fb02349188e0668c94f8775bd5697394fc88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5652 5644 bytes
font_01_sfnt_off0000696a.bin
de0cd6597f6ec7a7d5a3fc246a931187446fba6ac52db63d0bcb76865acc9f89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x696A 9844 bytes

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