Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c1e58a27664c2f…

MALICIOUS

PDF

40.3 KB Created: 2020-09-09 02:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25d7b596e6855fefbc71fe40146aae7c SHA-1: e28340e6f9f4bb2097e467b8094d458e90cf1085 SHA-256: 94c1e58a27664c2fecfdcaaa6c05950707b4217c5d295a0e29f50ab7cb1ca604
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.me/pify?keyword=calendar+template+2020+free, which is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, contains references to calendar templates, reinforcing the 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.me/pify?keyword=calendar+template+2020+free
    • https://cdn.shopify.com/s/files/1/0434/0560/7062/files/49218676444.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/admiral_general_aladeen_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0463/9693/2251/files/55491944106.pdf
    • https://static.usrfiles.com/ugd/efb3f0_c440f73d93cd43faa5dff334332624a0.pdf
    • https://static.usrfiles.com/ugd/299074_34ce0225528b448ba6e3c24f68b60dc7.pdf
    • https://static.usrfiles.com/ugd/5ecadc_35f6bfe63ddc4b1198775bb7215099ee.pdf
    • https://static.usrfiles.com/ugd/140efa_6cb7dcd6eb7744d6a3c5dfdc01de94cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8f9b1f3727c49e0a214c508011206bd.pdf
    • https://static.usrfiles.com/ugd/09c3c7_fb1b922e3e14459e88c83f3825937ba7.pdf
    • https://static.usrfiles.com/ugd/2d1648_68aa6f5c921b4ab0bc00c937a586a293.pdf
    • https://static.usrfiles.com/ugd/b96e41_3f6a2b592bc945839c67401724c6f1d1.pdf
    • https://static.usrfiles.com/ugd/704f6c_a3b192235d7b440ba8dc82206b9640ec.pdf
    • https://static.usrfiles.com/ugd/d2057d_951392588fe24df893c1c7454628c1e5.pdf
    • https://static.usrfiles.com/ugd/d01287_d1eebd10ae96491c987605f777349f5f.pdf
    • https://static.usrfiles.com/ugd/e32576_7a347aeb5b8248fc9f219f20f4aa4f1a.pdf
    • https://static.usrfiles.com/ugd/868f76_e56528fa0958471fbe04984edfaacb93.pdf
    • https://static.usrfiles.com/ugd/f1d680_4f341df240184f3585dede0df45d0a72.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_off00005ffe.bin
fde60b7c2e6b022e16047926bbd9fa155c1fc3c00e227a86c9574413a30993d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFE 5188 bytes
font_01_sfnt_off0000718b.bin
ff8f5784f121fe6c4feb7f0630336d0a16a17e31676f5eb1094df5da3b025423		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718B 10316 bytes

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