Malicious PDF — malware analysis report

Static analysis result for SHA-256 70cb155bb644c18e…

MALICIOUS

PDF

44.4 KB Created: 2020-08-11 23:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9e7130e8f68f05540b73c0b10b295c0 SHA-1: 8455bf1d6e760a608e223ed621a95eebf494e10c SHA-256: 70cb155bb644c18e367bce96b3138f4f2e18a02bda2ec7e3d8d4ee5ad6fbd3f3
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document contains a lure to enable macros or editing, a common technique for malware delivery. It also embeds numerous links, including one to a known malicious redirector at 'https://ttraff.cc/pify?keyword=pdf+to+word+macro'. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded links suggests an attempt to lead the user to malicious content or downloads.

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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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=pdf+to+word+macro
    • http://files.metaphorboutique.com/uploads/1/3/1/4/131454883/4846898.pdf
    • http://files.stseachnalls.ie/uploads/1/3/0/7/130739315/1250517.pdf
    • http://files.bskyfitness.com/uploads/1/3/1/3/131381450/tipej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/boxoxujivig.pdf
    • https://cdn.shopify.com/s/files/1/0429/7110/3395/files/agile_project_management_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/3319/6706/files/cataloging_and_classification_an_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0429/6310/8003/files/carnet_de_sante_france.pdf
    • https://cdn.shopify.com/s/files/1/0434/6154/2054/files/42738968112.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/75139496445.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/avery._com_templates_5163.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3553/files/sawujosasixuniguwiguxebut.pdf
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/carmel_by_the_sea_map.pdf
    • https://cdn.shopify.com/s/files/1/0429/6749/8911/files/mezidinobejoralute.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9639/files/guwugugunalasebegiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6405/files/webus.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_off00006550.bin
648ea070b65055b267d7c904031fe77374d6d40cdc77beaf7b22ac9e7c10cf45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6550 4568 bytes
font_01_sfnt_off000074d0.bin
1ab08def4828b0f38e9dbe062c32982a96780752a14d0b51ff3fc65ca2a44bb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D0 9860 bytes
font_02_sfnt_off00009690.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9690 4324 bytes

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