Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f4ae141fa209b4e…

MALICIOUS

PDF

39.6 KB Created: 2020-08-29 01:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b2aebe100236e4e19bcd6e17d330f01 SHA-1: 5fd2b41587316abd1950089db6404d49fcc88f57 SHA-256: 0f4ae141fa209b4ebffc03f1ba01cdec371cdefed44ae6b3c1e351397548bf6c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL associated with a known redirector. The document body, though partially corrupted, contains text related to a game trial lure, which is likely intended to entice users to click the malicious links. The presence of numerous external PDF links further suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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=halo+combat+evolved+free+trial+game
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0462/6835/0626/files/tails_os_mac_os_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5250/files/fasufuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/2401/5783/files/6th_pay_commission_revised_pay_matrix.pdf
    • https://cdn.shopify.com/s/files/1/0438/0390/2112/files/new_idea_5209_parts_diagram.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d82077ae4b04b6c9db8b1b80dbb3915.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3903/files/71676061068.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/75655534943.pdf
    • https://cdn.shopify.com/s/files/1/0433/9597/3271/files/25365980473.pdf
    • https://cdn.shopify.com/s/files/1/0432/0775/3888/files/78599991610.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/toxugakesodidatole.pdf
    • https://cdn.shopify.com/s/files/1/0436/9953/6040/files/ruwutibazidawitidunefa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4891/8440/files/tamil_nadu_budget_2019-_20.pdf
    • https://cdn.shopify.com/s/files/1/0437/6693/9799/files/minecraft_galacticraft_mod_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/7673/1558/files/46044384631.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_off00005d67.bin
8607cff201f64af76d77f1a75999fc8f3376be54605b965148bb2028b046d9c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D67 5324 bytes
font_01_sfnt_off00006f78.bin
7565e5597aa6cb41ba228666a7a25f9113ca02cf4fe491dfe964ef7a3d85e0ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F78 10024 bytes