Malicious PDF — malware analysis report

Static analysis result for SHA-256 f742a5ab517135ce…

MALICIOUS

PDF

44.9 KB Created: 2020-08-19 04:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce956147b77b7a7ff396420c40955ce4 SHA-1: 30e888c4fba96f20c75fbbd67853bff629cd97c9 SHA-256: f742a5ab517135cec57e4c29e75f48384ff5c099fab650e1153ebf8d0fd22a8d
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised with a keyword related to video downloads. The document also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious 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.cc/pify?keyword=new+bhojpuri+video+hd+2019++mp4
    • http://files.narfewa.org/uploads/1/3/0/7/130738790/b4521c79c8.pdf
    • http://lodunokom.newwoodturners.org/uploads/1/3/1/6/131606490/ecdf4925968134.pdf
    • http://files.netstreamz.com/uploads/1/3/1/4/131407459/xifusepokefa-garidazeves-lesosu-jezozov.pdf
    • http://files.8foodallergensfreedelicious.com/uploads/1/3/1/3/131397934/lewos.pdf
    • http://files.artventures.org.uk/uploads/1/3/1/3/131398367/fotuduvivepiguwu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/endless_alleluia_piano.pdf
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/88027987784.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/30126592406.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/13220298338.pdf
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/difference_between_deductive_and_inductive_reasoning.pdf
    • https://cdn.shopify.com/s/files/1/0434/3028/1381/files/xovagiruz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0380/5847/files/book_read_out_loud.pdf
    • https://cdn.shopify.com/s/files/1/0438/1786/1277/files/54635435240.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/81040329386.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/mere_paas_tum_ho_full_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/amoxicilina_500_bula.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/applied_underwater_acoustics_leif_bjrn.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_off00006755.bin
ebc4c35eae09e4d5dee942172a515e32e0b9b80a7feb1afa951a906cee48be00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6755 5688 bytes
font_01_sfnt_off00007aad.bin
9290a8cafdc0c26e711f2d0ca797010f5bb5ab5db9269dd00174115d2c1f705b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAD 14400 bytes

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