Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94a908a5c6ed576…

MALICIOUS

PDF

48.0 KB Created: 2020-08-29 20:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd71cec44afa2aee74f06a80b222bdd8 SHA-1: f357a717d1b7050208a2572c7d0ccac79cabbd98 SHA-256: d94a908a5c6ed576ad9d9701064bc7576b7d1933be1d7bfdd04acdb357de247f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF file contains a large number of embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One of the primary links, 'https://ttraff.com/wix?keyword=the+demolished+man', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

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=the+demolished+man
    • https://static.usrfiles.com/ugd/b8c837_79205009721042c7a088d05b4efaf80a.pdf
    • https://static.usrfiles.com/ugd/b8c837_407fb36b545b451db726156f0a55eebe.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2e163d0ad8f4ade89c02e5fa1497de2.pdf
    • https://static.usrfiles.com/ugd/b8c837_448ec3f79e474b6ca43ac27f3f374d1f.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf4b339f1a4347c79ef99a2861765bba.pdf
    • https://static.usrfiles.com/ugd/b8c837_133d4397d13245c8aac7a98d672075fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_495b255cf0bb4d7cac6070c91c4eddff.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b5273dffdb441f7a8ceb13b5a741aba.pdf
    • https://static.usrfiles.com/ugd/834936_47db8684455e448abb7830ca80cdec0a.pdf
    • https://cdn.shopify.com/s/files/1/0432/8272/7067/files/busidurerodig.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/kijuxegowevarimugel.pdf
    • https://cdn.shopify.com/s/files/1/0439/0522/0763/files/ignatius_bible_study_guide.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_off00006895.bin
faf38387442f53aad953da789edc1d4b22bf2a6c2ddeeafb06da49b043b4cf06
pdf-font-stream PDF embedded font (sfnt) at offset 0x6895 4920 bytes
font_01_sfnt_off00007930.bin
3d782494c661e95f7fe814c83f0f460b97a9c2e0d745f9e22fe1263b61628a1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7930 10684 bytes
font_02_sfnt_off00009ccf.bin
cec042b489424805abf6ab44bc32058563211b02f99c26feb21d5530b74bdaab
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CCF 16116 bytes