Malicious PDF — malware analysis report

Static analysis result for SHA-256 40387dde94817850…

MALICIOUS

PDF

35.7 KB Created: 2020-08-24 00:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f30ee90e4e2dd82b0684eda651764a78 SHA-1: f3bbd4c0e1d0b7eeb68882cba878f0bf155864a7 SHA-256: 40387dde94817850f5d85d1df2f305128fd53ba6e42411f5d482bf5b35689827
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One critical heuristic identified it as a PDF link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains the URL https://ttraff.ru/pify?keyword=tv+guide+itv+1+plus+1, suggesting a lure to potentially malicious content. The presence of many links, including those to Shopify, indicates an attempt to obscure the true destination or to leverage seemingly benign platforms for distribution.

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.ru/pify?keyword=tv+guide+itv+1+plus+1
    • http://files.azpeorialodge31.org/uploads/1/3/1/3/131383934/6611776.pdf
    • http://joraxilid.sailstutoring.com/uploads/1/3/1/4/131437246/e52c44f.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/africa_mapa_politico.pdf
    • https://cdn.shopify.com/s/files/1/0431/9114/0501/files/buvezopukewudofalorivaboj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9118/2243/files/baasha_tamil_movie_songs_free_tamilwire.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/what_is_igfxtray.pdf
    • https://cdn.shopify.com/s/files/1/0437/9348/1885/files/tufotolegunisil.pdf
    • https://cdn.shopify.com/s/files/1/0432/2961/0141/files/articles_worksheet_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/78921882253.pdf
    • https://cdn.shopify.com/s/files/1/0432/1397/9812/files/46163144768.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/busigapofovufagexefawodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/animoji_for_iphone_x_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/tikewikali.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/bibuzej.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/dimoxikibu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7179/0486/files/ejemplo_de_una_acta_constitutiva.pdf
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/ratiretopuraxarukoferabab.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fd2.bin
4c17cba4d148f97ce166b13b326a61251a7dd5e1edf8967863bc7f4062de0870		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FD2 4880 bytes
font_01_sfnt_off00006092.bin
653d4bd3c32fbd5efc2362bb77cc44cbb43dcf8f7f9f8fa0534dbbbfa16f741b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6092 9876 bytes

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