Malicious PDF — malware analysis report

Static analysis result for SHA-256 84cc085b2045c1ad…

MALICIOUS

PDF

38.4 KB Created: 2020-08-30 06:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b95cc6f501ecc5dbd87ae32cea589a4e SHA-1: 14655dd338280661c719581f8f7be38be23e9aad SHA-256: 84cc085b2045c1adb557ac4a44e903f74bb8f058bff5569ceab3c64bf296c614
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to generate SEO traffic. One prominent link, disguised as a download for 'Managerial Economics Thomas Maurice 10th Edition', redirects to a malicious URL (ttraff.cc). This suggests a phishing or scam attempt, likely using the document as a lure to drive traffic to malicious or ad-heavy sites.

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.cc/wix?keyword=managerial+economics+thomas+maurice+10th+edition
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3548/3551/files/defying_gravity_glee_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/90432202316.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9516/files/fiwizopidoda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.pdf
    • https://cdn.shopify.com/s/files/1/0428/2020/6758/files/wulapuvir.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5851b7d7c97454088283c3c9af42434.pdf
    • https://static.usrfiles.com/ugd/b8c837_02d3e4587d254423a7fbd95ea432ab12.pdf
    • https://static.usrfiles.com/ugd/b8c837_ceefa6617de046cab9af5e0a9b652215.pdf
    • https://static.usrfiles.com/ugd/2e16aa_a8bda448dd5a49e38c94b67391e0aa3b.pdf
    • https://static.usrfiles.com/ugd/b8c837_d090bb308f51431c84846676e81c1668.pdf
    • https://static.usrfiles.com/ugd/20d83a_925fa3364e8b40f19f65ac5b07d32217.pdf
    • https://static.usrfiles.com/ugd/865d50_54bef83241d747538064a1aafecd8052.pdf
    • https://static.usrfiles.com/ugd/b8c837_f649b29c8daa4343b9c42aeb9ebec8ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_04575e3c877248a19f699182ba6cc4b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_693ee6fde0234f50981d66cb7a8eb40f.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055ee.bin
daea91ad16407614a822b8ffd89c92c7bba9b60e3767406058e9e7c300fc1303		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55EE 5552 bytes
font_01_sfnt_off0000689d.bin
c4341165a8d98a9c89e66eed3b8e4ad8669c9606d2ffa690ebb072ce143cff9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689D 10604 bytes

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