Malicious PDF — malware analysis report

Static analysis result for SHA-256 e591979f957c96c6…

MALICIOUS

PDF

84.7 KB Created: 2020-08-30 01:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24d95fe688e8bff1f32e06bc7987c225 SHA-1: 32de10e6d864939e8f30f531062069acb2fb429c SHA-256: e591979f957c96c660793201c48badbd0c23609a88c366ad6b2bdcf82c10eb84
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=how+old+is+tom+clark+wnep'. Additionally, a PDF SEO link farm heuristic indicates the presence of numerous external links, with the dominant host being 'cdn.shopify.com'. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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/wix?keyword=how+old+is+tom+clark+wnep
    • https://cdn.shopify.com/s/files/1/0430/8199/0304/files/dijesajupo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/biryani_hd_making_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0430/6914/5241/files/63196699247.pdf
    • https://cdn.shopify.com/s/files/1/0429/5173/7498/files/71957897574.pdf
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/muriwapivikoxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0646/6976/files/zaronikomeduxoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/examen_regional_francais_la_boite_a_merveille_avec_correction.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8909/files/zebizujabepuxafumefepalo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2603/8433/files/wcad_homestead_exemption.pdf
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/sigotafoxenatetolinedonaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7967/files/44870261606.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/84110579515.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4661/files/zugufanimatozobemiwanun.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/uno_agencies_and_their_headquarters.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2967/files/big_bang_edge_test_answer_key_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/1144/0803/files/python_anti_patterns.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001005f.bin
1a4b950d1535357b6b2d4a675be80533a681920f5198f348d71561123e8e6748		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1005F 5124 bytes
font_01_sfnt_off000111bb.bin
2ea34e0f9ba9248fb62e8ae4a30baeafd6bbc6c8683dd4856c288889dd50d6b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111BB 11052 bytes
font_02_sfnt_off0001378a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1378A 4324 bytes

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