Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7279d02d473d9d2…

MALICIOUS

PDF

33.2 KB Created: 2020-08-30 09:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0c3420ec50a1d6065495fe583ff8125 SHA-1: b74b6a2b8543ee69a1b5bc029ef5336ea16df033 SHA-256: d7279d02d473d9d2ccaeb7cd413aa820fd3b0b09084d8c4a531a38d61b81988e
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a link farm of external PDF documents. One of the embedded URLs, https://ttraff.com/wix?keyword=sata+minijet+4, is identified as a malicious redirector. The document body contains garbled text but includes the aforementioned URLs, suggesting a lure or redirection mechanism. The primary attack pattern appears to be SEO poisoning or a redirector to a malicious destination.

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=sata+minijet+4
    • https://static.usrfiles.com/ugd/0a593f_59dea0ad2a964b97a42c4b432fa8f6b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e013ddffe1141b6ae4e7d874a777881.pdf
    • https://static.usrfiles.com/ugd/b8c837_cec5fffabf6c46e29bee0d0afaadb69c.pdf
    • https://static.usrfiles.com/ugd/badafb_003ffc75fad54ba990c10ccd0f2c1a06.pdf
    • https://static.usrfiles.com/ugd/b8c837_59faa54f4929421b8ef1af17bd4c860f.pdf
    • https://static.usrfiles.com/ugd/b8c837_63c0b9f2540f43eb8908bfb08b4540fe.pdf
    • https://static.usrfiles.com/ugd/38bf1f_f5fefe35c9644a86882a8c5e224925b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd7b245c3f97477db917eeb81f262350.pdf
    • https://static.usrfiles.com/ugd/f0e51d_2efd4fff7322417ab476cbd21d3b5956.pdf
    • https://static.usrfiles.com/ugd/353d00_b4ba64674fa54fad929351bd3eecf23c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5525ed7b916441298663e2afd7080dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7318f5f86d74ce6b90b071dcefc3fb6.pdf
    • https://static.usrfiles.com/ugd/ec0c41_a28b116b2ce14637a1999d946145f97b.pdf
    • https://static.usrfiles.com/ugd/09c3c7_38aff0e2a31d4aea93ac2f608618b82e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bddd9dbab824720ad073600196511af.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_off0000479a.bin
cd33e3228cc5204a27eff054d7f114e4b6fafd13054419cb82d302c03a082f9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x479A 4792 bytes
font_01_sfnt_off000057d6.bin
ded5b192d1b3b391921090b9367e30353de34630e4ac169671c0088ceefcfcd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x57D6 9572 bytes