Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8c6ff3139b0a6c…

MALICIOUS

PDF

112.7 KB Created: 2020-08-19 03:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f52a6365f9fe045ceaa1e48c2fd68c6b SHA-1: aac3508938d6074a2e098f47d785355092a121d7 SHA-256: 0e8c6ff3139b0a6c23f9c5b8715d4ce7c881211398466377cd39df174d4d0f9c
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL which is likely intended to trick the user into downloading further malicious content or visiting a phishing page. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.cc/pify?keyword=hotpoint+aqualtis+user+manual
    • http://files.vibrationalcleaning.com/uploads/1/3/0/9/130969917/d48752f5587c6.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/5880/7455/files/18704553509.pdf
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/lanosejijawesiruguva.pdf
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/64852841917.pdf
    • https://cdn.shopify.com/s/files/1/0440/4147/0117/files/cd4011_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/8832057101.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/jebazagonog.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/61160202671.pdf
    • https://cdn.shopify.com/s/files/1/0431/6259/9583/files/gafasudolefafum.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4348/files/up_movie_theme_piano.pdf
    • https://cdn.shopify.com/s/files/1/0428/3006/9927/files/human_heart_system.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/23357527713.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000156da.bin
61220a0dae34d1298b72f9dc29e84aaedfd295c424e610d0b93cf322ab2cb80f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x156DA 1768 bytes
font_01_sfnt_off00015f81.bin
6cd5a5271a8686fbae4d7ea1f52664f6c9a946cc9dd7c9ea16548e7d35a400f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F81 4936 bytes
font_02_sfnt_off0001701a.bin
2f430097b0e4e500d7174239800a4340685bc181b3707dff1089dac455c017f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1701A 2048 bytes
font_03_sfnt_off000178fa.bin
96731800414535a91d1705b4c254f9eca4c6e3c8d96a3bce77c151bc2d9b439d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x178FA 15012 bytes
font_04_sfnt_off0001a6db.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6DB 4324 bytes

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