Malicious PDF — malware analysis report

Static analysis result for SHA-256 c980b752145d5e7a…

MALICIOUS

PDF

33.1 KB Created: 2020-08-30 16:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4d3f0f95e9be6b519c587889104b8bc SHA-1: 20104a2b3157c48427d85818de7d61b21a4d9849 SHA-256: c980b752145d5e7a111f5fa674e52e9ffbc858ba02bf92ed88fb3f2a84307eb9
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that directs users to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous other links to external PDFs, flagged as a link farm, further supports a malicious intent to drive traffic to potentially harmful sites.

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.com/wix?keyword=cengiz+han+filmi+indir
    • https://static.usrfiles.com/ugd/b8c837_565e142e74bb4bff947d7d6f5e03d185.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f59dcc6f09e496f9b992b449d9a0371.pdf
    • https://static.usrfiles.com/ugd/b65acf_56e4cfffc44a432ab680114f2c73e55a.pdf
    • https://static.usrfiles.com/ugd/eed56f_b5116492d44e43439d03c627a5714e67.pdf
    • https://cdn.shopify.com/s/files/1/0433/4731/2789/files/9099167514.pdf
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/49319427115.pdf
    • https://cdn.shopify.com/s/files/1/0463/2461/3275/files/smoke_shisha_play_fifa_mp3_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/14878519114.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7592/files/xowivos.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_bf12d822a9a24a038cf082ccc0fe5a95.pdf
    • https://static.usrfiles.com/ugd/6cfc61_45461254c15244aeb50e937d5717402e.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_off00004247.bin
c700fb1f2da16398d860e94b594f99e3cb9970868be5070ace5000459357c38f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4247 5100 bytes
font_01_sfnt_off00005378.bin
fc5f31346cc9f1fa5bb8f4966bba6b63d0b5f5abcaeabdb0bb4b45d7543cdcb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5378 11216 bytes

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