Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ed71eb17e1b779…

MALICIOUS

PDF

47.4 KB Created: 2020-08-31 21:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c702467889a65811f146b045fa68297b SHA-1: 56fb547072182607fd29b15e53f64a6230f93822 SHA-256: 19ed71eb17e1b779c55106885c204cdb83d2fa0743ede1706ef3b5272a2d40af
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=cinema+v2.+0.+5+apk'. This URL is likely used to redirect users to a malicious download or phishing page. The document body, though heavily obfuscated, also contains this URL and references to 'Cinema v2.0.5 apk', suggesting a lure for software downloads. The presence of a large number of external PDF links, many hosted on 'static.usrfiles.com', further indicates a link farm or redirection strategy.

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=cinema+v2.+0.+5+apk
    • https://static.usrfiles.com/ugd/82e28d_28d94bf8996e4fd99644ac8391821ef7.pdf
    • https://static.usrfiles.com/ugd/18122d_602a09a3ec3b428fa8b5ed38030d696b.pdf
    • https://static.usrfiles.com/ugd/b8c837_8efc84ac797149e7b103bb65430a3f90.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc1238428dcf4ae9b46b6b07ae68358b.pdf
    • https://static.usrfiles.com/ugd/1be480_38b4e1d3fe91445491665f0014887e07.pdf
    • https://static.usrfiles.com/ugd/0d002d_12916601b9f645ba856f050c929667bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d4996c4c49c4289a8913bc5ffcd4555.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcd73173324c4de8a8ee1a869514911c.pdf
    • https://static.usrfiles.com/ugd/3e9e83_0f0c56a37c8a4f1296e6a6a961c60641.pdf
    • https://static.usrfiles.com/ugd/7603ae_5862a0046d654e56b626bffc04c200f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d930bf6192f4a5fbd60638776992fd6.pdf
    • https://static.usrfiles.com/ugd/430cb2_28053393cc744b69a093a76986b810da.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7a1767b0ebf4c67a7d7807bdf1b2781.pdf
    • https://static.usrfiles.com/ugd/b8c837_71abadd34b074b6fbf1a82c59012821b.pdf
    • https://static.usrfiles.com/ugd/738632_0f941a7f33424c2fa3dab99b985ea6f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7721a74e7c04820b2f17953fdbb5f10.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000669d.bin
4164021636bd467cf2e79bcdb83b6448d1c65aa949aa9b2cbfc481f4d798b92b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669D 4832 bytes
font_01_sfnt_off000076f1.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F1 1800 bytes
font_02_sfnt_off00007f7e.bin
10140b34509b765451cde8d55f4323764315d9848cd5ef4500293cfdc7bd6cbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7E 10184 bytes
font_03_sfnt_off0000a24a.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA24A 4324 bytes

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