Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9bcd973381fa226…

MALICIOUS

PDF

48.0 KB Created: 2020-08-29 18:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4ab7ffa79928eee32dc8f842749d6bd SHA-1: acd8c7c4ae756c0b95165f44a82c4b5f4712aa49 SHA-256: b9bcd973381fa226f7aafa297a2af9e6476f2672227624d41f1cc46f4c9b297a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded URLs, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of a link farm suggests an attempt to lure users to potentially harmful sites, possibly for phishing or malware delivery. No scripts were extracted, limiting the analysis of specific execution behaviors.

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/wix?keyword=commerce+garage+new+orleans
    • https://static.usrfiles.com/ugd/b8c837_ef234dbc50ba436d97c79d7dd39e1eb0.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0c5c8310f484135a19d3c23c33bc028.pdf
    • https://static.usrfiles.com/ugd/b8c837_354a95618d324d27ae6063bcd34cfe0b.pdf
    • https://static.usrfiles.com/ugd/5ed537_1b7f795e5cc4448a99cab9b99dccd432.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a36d9949354433ca8684a5763695c9d.pdf
    • https://static.usrfiles.com/ugd/760101_d3fe88358dde4ef5b8ca2e918d36088f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e8e8454c5ca4b17a035b86919f28ad0.pdf
    • https://static.usrfiles.com/ugd/b8c837_536bd763bcd1499d97446ca71d119e90.pdf
    • https://cdn.shopify.com/s/files/1/0430/9198/4535/files/cantico_delle_creature_commento.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/xajidamadoxorabojuronake.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/whatsapp_apk_mirror_2._12._194.pdf
    • https://static.usrfiles.com/ugd/576447_cf37947578114c208acde0d2947d8a1f.pdf
    • https://static.usrfiles.com/ugd/6924eb_d1d6811c459a4317a302cabbaf35c5ac.pdf
    • https://static.usrfiles.com/ugd/d4a9d6_a35611fcdb5d411e926fbf739b1827d1.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_off00007043.bin
8696da4b43c95e4b654ce8d6b571de3b20138851e92b8b0db515ef80cb04a151
pdf-font-stream PDF embedded font (sfnt) at offset 0x7043 4896 bytes
font_01_sfnt_off000080c9.bin
982a04887bbfa9061e6525eb9f7ee5e193ec6e79a34c3d33c40f18df85e1463c
pdf-font-stream PDF embedded font (sfnt) at offset 0x80C9 10656 bytes
font_02_sfnt_off0000a544.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xA544 4324 bytes