Malicious PDF — malware analysis report

Static analysis result for SHA-256 09cabd1e7d123f3d…

MALICIOUS

PDF

50.5 KB Created: 2020-08-03 03:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7357f0cda85b74e6cc60dd28fff4cd4 SHA-1: e8d46187cfb4a4753d63388924752af3615db693 SHA-256: 09cabd1e7d123f3d9588ac0a2a6031c0fdeb129ba4d4184aad7a0cdc1d4615c7
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for malicious redirector links, specifically pointing to 'ttraff.cc' with a lure for 'vmware 14 key'. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. The presence of a password-protected archive lure suggests an attempt to bypass gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.cc/pify?keyword=vmware+14+key
    • http://files.shilandsujitarts.com/uploads/1/3/0/7/130775197/minutonameme.pdf
    • http://files.microcosmpodcast.org/uploads/1/3/2/6/132682232/a9db38ac7ad.pdf
    • http://files.lizhardleyimages.com/uploads/1/3/0/7/130775866/zodomefa_luwas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/bulla_dragon_ball.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/zojexag.pdf
    • https://cdn.shopify.com/s/files/1/0428/2171/4079/files/22247529914.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/22030810084.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/omega_bullets_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/star_wars_the_rise_of_skywalker_metacritic.pdf
    • https://cdn.shopify.com/s/files/1/0428/5333/5207/files/zetarateruxama.pdf
    • https://cdn.shopify.com/s/files/1/0437/9561/1810/files/45673956901.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/tefomakegev.pdf
    • https://cdn.shopify.com/s/files/1/0450/4076/3030/files/code_alarm_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2605/4306/files/3189296436.pdf
    • https://cdn.shopify.com/s/files/1/0435/8343/9003/files/manual_brush_cutter.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_off00007875.bin
884fa236f6e0618e2d9e1a9e39d387a8326e7ac1605e9397ad2e7b44092a3d82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7875 4984 bytes
font_01_sfnt_off0000896e.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x896E 1800 bytes
font_02_sfnt_off000091fc.bin
7f11e61160c917a451d5a620c7a853135233fcafd7293d31ec31ce4fcf89e025		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91FC 13608 bytes

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