Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6598fdbe2a697c8…

MALICIOUS

PDF

36.1 KB Created: 2020-09-09 00:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c3f7c5667bc15cd7602d3b9df853f6e SHA-1: 973d7278412a158c696a243c4aefe05c01fef2dc SHA-256: c6598fdbe2a697c89225a07c08217195835350be1102102a871915bf51fa3b77
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Thiruttuvcd tamil movies 2018 hd', suggesting a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

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.club/pify?keyword=thiruttuvcd+tamil+movies+2018++hd
    • https://cdn.shopify.com/s/files/1/0431/6417/2445/files/2051779392.pdf
    • https://cdn.shopify.com/s/files/1/0435/4962/2431/files/97013434731.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/wefozutuxobikaf.pdf
    • https://cdn.shopify.com/s/files/1/0445/1729/4239/files/tuberous_sclerosis_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/wevis.pdf
    • https://static.usrfiles.com/ugd/f1780b_d3e9e50e75c64644a343f27c45a93989.pdf
    • https://static.usrfiles.com/ugd/04e6f9_4dc0b7e1894c4a2cb221c85cd83144c4.pdf
    • https://static.usrfiles.com/ugd/2dbf5a_d559fc8480df4784970e9c2d6caef0f3.pdf
    • https://static.usrfiles.com/ugd/007d40_f9d1e699836a4549aefbb18d23006eb9.pdf
    • https://static.usrfiles.com/ugd/269bb8_4f20315e2f974a569a3cf91ad24a21cc.pdf
    • https://static.usrfiles.com/ugd/c75f60_4b83d56a8e734715b13f77b2c220b878.pdf
    • https://static.usrfiles.com/ugd/38eac1_5c1ae75a0f3a4572b61e4b3d126ec7a5.pdf
    • https://static.usrfiles.com/ugd/6c98bc_4cc937a670fb4a548cfd22f2e0a5e112.pdf
    • https://static.usrfiles.com/ugd/8b49c6_c2cc0a32ba314fce88c94e1c1143f038.pdf
    • https://static.usrfiles.com/ugd/4cd51e_9b5edada11824be09ad8a3ad02f25f8c.pdf
    • https://static.usrfiles.com/ugd/d775a9_f3e8c16771604ced968e6b9cf6dcf884.pdf
    • https://static.usrfiles.com/ugd/221f3a_cb0bff1fe9924afeafe25278e64150e0.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_off00004c90.bin
787efa684b5ab68c5fb5da996124d778f63afa57e69087c5852fb1e82f267180
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C90 5708 bytes
font_01_sfnt_off00005fd6.bin
e7272d3670c0b571091811d3ad832d609a2e04a52bdc56c8e40e294962a8f286
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD6 10440 bytes