Malicious PDF — malware analysis report

Static analysis result for SHA-256 7187a064d4197eda…

MALICIOUS

PDF

46.2 KB Created: 2020-09-01 22:39:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 216162428a01b32290805b5b2ae0cb2a SHA-1: 630ab127c1b081c9016722d59393fe0bc1b0f1ec SHA-256: 7187a064d4197eda8245807b69d36ece82e81c127637819db34dd220c9077fbe
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link disguised as a software download. The ML classifier strongly indicated maliciousness, and the PDF was flagged for linking to known malicious infrastructure. The embedded URLs and the document body suggest a phishing or scam attempt to trick the user into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/pify?keyword=crystal+reports+10.+5.+2.+0
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_f8d12838077847a99950e74cb370d10e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c274e91da040459b9796b3f7d95bebb5.pdf
    • https://static.usrfiles.com/ugd/b8c837_20bf0c9171154a18bdc394bd83543d88.pdf
    • https://static.usrfiles.com/ugd/b56239_0203e63e6f4e40ddb52ff54073e0c828.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c1c2a3713ab43eab5e5e0d28b856f2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9631e454f8c64eb89350741a13eb1129.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5302/files/nekikubilatiwuwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/49976160627.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/zuseni.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/arborists_certification_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9009713252.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f46.bin
a0eb9dc25ce37fa0734624fa53fb0660c7ef7623950652afd16e697bf3660f64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F46 5304 bytes
font_01_sfnt_off0000716d.bin
7965435d50c705fe562355cb4028fdc000f9db6821ea6aa15b15d337953fdc3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x716D 10840 bytes
font_02_sfnt_off00009690.bin
ed45a24507f18daeaf6b6e9cac20235e9e43bed88bc2d44b7621eff085e31190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9690 16344 bytes

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