Malicious PDF — malware analysis report

Static analysis result for SHA-256 55a951220c912664…

MALICIOUS

PDF

47.8 KB Created: 2020-09-02 01:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0db6ff7e23bb9fcee94fd9460c41cfe4 SHA-1: 3bbf35808b6114e25c66855cd622dd70101cd545 SHA-256: 55a951220c912664f607ddf1659a9c35d628ec58bfcd69cca435ed7b8278a0a1
152 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily garbled, contains text suggesting a 'car registration renewal form nz' lure. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, likely for SEO manipulation or to distribute further malicious content. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=car+registration+renewal+form+nz
    • https://static.usrfiles.com/ugd/b8c837_796876de88fd40fba1d728efb3eaeb1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_f63b7dda1d4145da991c40674ec6acab.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_fe31e0db08874065b173f674f91cf3c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_286d42d3721b4a818ad156a9620b876c.pdf
    • https://static.usrfiles.com/ugd/9ea91e_9958c40947f44456b5b622d7a3faaa6f.pdf
    • https://static.usrfiles.com/ugd/9e41f0_249b99e0e28243168185e5a6a74806c5.pdf
    • https://static.usrfiles.com/ugd/685707_146796e844984ad6bb64f7cc518b8165.pdf
    • https://static.usrfiles.com/ugd/493135_e9546ba27074489681d5641221b55b22.pdf
    • https://static.usrfiles.com/ugd/47b1e8_5de365e67bd04ba1806248133d37f92e.pdf
    • https://cdn.shopify.com/s/files/1/0435/4100/4439/files/pexemegekevisi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5672/6165/files/pusixe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18491093394.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/vetoperadobol.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/aarakshan_full_movie_in_hd_720p.pdf
    • https://cdn.shopify.com/s/files/1/0430/7704/2325/files/pemuja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f22.bin
b235e2a09d77a5058f9c1b3a0dd82d640dce312cd3a523618a74e48339efe89c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F22 5040 bytes
font_01_sfnt_off00008050.bin
328d09427d9c991ce4b2ce8f7b338d31032be9eeabe0de1940c5647c984fca7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8050 10468 bytes
font_02_sfnt_off0000a425.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA425 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.