Malicious PDF — malware analysis report

Static analysis result for SHA-256 7315d14fa10e959d…

MALICIOUS

PDF

49.8 KB Created: 2020-08-30 15:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81e072d5878d6dbde29037195a40cb55 SHA-1: 75fa6b4f4c27d0806e1bb68f04fb67fb77e81003 SHA-256: 7315d14fa10e959d05ada398942a4e21d6db17e6231a9e8da8859f38cf8f113d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'ht2000 motherboard manual pdf', suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to distribute further payloads. The ML classifier strongly flagged this PDF as malicious.

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=ht2000+motherboard+manual+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/7723/7913/files/zofupotenolibefomufunup.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/dukowitutunodavajexuxoxoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/9130790589.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/tileguvatejetoxaxalo.pdf
    • https://static.usrfiles.com/ugd/73f3b0_e4ab25b6cb8b4831acd95efb4d330fe7.pdf
    • https://static.usrfiles.com/ugd/97368a_5c13b50287894bc899e603b16e342826.pdf
    • https://static.usrfiles.com/ugd/c1de29_25b25e21c8ac42c5aedb160c3009b66b.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/mefupedakur.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/dotod.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/xuzomuwamunovalo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/govazepiperogutowugofit.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2374/files/fury_warrior_tbc_gear_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/4094/8892/files/is_universe_sandbox_2_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/beehive_class_9_chapter_2.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_off00006dea.bin
63297d3f21f59cd1f4f203464138f0503e874d5bb588ff083d2824dc9656ac5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEA 5312 bytes
font_01_sfnt_off00007fbb.bin
e2af35127575512ee7ed8970680635e16e01ab121f341b75c226995591118ab3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBB 14248 bytes
font_02_sfnt_off0000ac92.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC92 4324 bytes

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