Malicious PDF — malware analysis report

Static analysis result for SHA-256 678ba95af73321c6…

MALICIOUS

PDF

75.8 KB Created: 2020-08-19 01:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4413055d43b9f292fd149e041e64883 SHA-1: 307d63ecf6cf3bb1e060d3f76a5496a1ceea8ef5 SHA-256: 678ba95af73321c6765036da5926209e526ee2d9527afd1f2b8d6e51aba9891e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector at 'ttraff.com'. The document body, though partially corrupted, contains text suggesting a 'weather report' lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the redirector, and 'PDF_SEO_LINK_FARM' indicates a large number of external links, many pointing to benign Shopify URLs but likely serving as a cover for the malicious ones. The ML classifier also strongly indicated maliciousness.

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=ktbs+weather+report
    • http://xawavid.hiesladybears.com/uploads/1/3/1/0/131070993/bijawitewe_venokevaleter_gogadigenufikor_fubiton.pdf
    • http://duzus.dynastynparadise.com/uploads/1/3/0/7/130740141/sutokotubeki-vipogow-febugabilibe-dogujifiwaf.pdf
    • http://kezage.thesassyladycollectionboutiqueonline.com/uploads/1/3/2/7/132710621/xidonojogisiz.pdf
    • http://files.sunnymspecialty.com/uploads/1/3/1/3/131381109/2021395.pdf
    • http://files.z-furniture.com/uploads/1/3/1/1/131164460/xirojuzoluk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3055/2474/files/bacteriologia_basica.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/ffv_job_planning_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/sumudaziredomemodedaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4111/9647/files/42953263617.pdf
    • https://cdn.shopify.com/s/files/1/0438/2025/3344/files/zudikoninebamog.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/lizipopekovafafagap.pdf
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/52055433782.pdf
    • https://cdn.shopify.com/s/files/1/0439/7475/4462/files/ritufawara.pdf
    • https://cdn.shopify.com/s/files/1/0437/5108/0090/files/hanuman_ji_ki_aarti_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0436/9835/6392/files/pakavadiruzobej.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/97802127712.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e233.bin
4a438b80759606953d6fd7bc0fdd11aa31743bf307463c20924eeefca7319acf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE233 5076 bytes
font_01_sfnt_off0000f37d.bin
6ebe16c4f790ad2aced5cfe63bd877d2043fb9c8605cc0dac3f260c8c5031a34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF37D 14780 bytes

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