Malicious PDF — malware analysis report

Static analysis result for SHA-256 088e52bb650bf939…

MALICIOUS

PDF

44.3 KB Created: 2020-08-21 03:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d21979294000ed08ea3de30886785a06 SHA-1: cbcc5d9251f56f21a94b460d9d810d1912725aa2 SHA-256: 088e52bb650bf939ca132650dde255ea1d61ad5d367570fa4c2be86589a64a15
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure designed to obscure the final destination. The primary link, 'https://ttraff.com/pify?keyword=analysys+mason+5g+pdf', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting the document's purpose is to drive traffic to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/pify?keyword=analysys+mason+5g+pdf
    • http://files.stambroseparchment.com/uploads/1/3/1/4/131482886/38f4029d2379b9f.pdf
    • http://files.dawnfeeneyjewellery.co.uk/uploads/1/3/2/7/132740378/kenoretefura-pexaburivixu.pdf
    • http://files.pburg94rescue.org/uploads/1/3/1/4/131413678/3e86dd8762f.pdf
    • http://files.deevineimaginations.com/uploads/1/3/2/7/132740293/butisepelemijanamu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4827/9957/files/19730196774.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/10540327890.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/34509237411.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9459/files/fuwuxixewaxukif.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/easy_to_play_christmas_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/7872/9374/files/kodoforanaga.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/biological_science_freeman_7th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/8339/1395/files/blaggers_guide_to_art.pdf
    • https://cdn.shopify.com/s/files/1/0437/2722/4986/files/articles_grammar_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/4178/2946/files/answers_with_joe_patreon.pdf
    • https://cdn.shopify.com/s/files/1/0437/0271/4536/files/sovawuxelepoto.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_off00005dff.bin
67b2a97ba71118bf05dd6c6f75e06c0f625fef47378ae49507e7827d0ed742d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFF 5020 bytes
font_01_sfnt_off00006eff.bin
bdadec84cf1a4b1cce4bf2bfe2ba02ebad27642c549f448ef303761b4fb23be8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFF 14248 bytes
font_02_sfnt_off0000966c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x966C 4324 bytes

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