Malicious PDF — malware analysis report

Static analysis result for SHA-256 97815cc31e6d8816…

MALICIOUS

PDF

40.8 KB Created: 2020-09-03 01:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ff03091fbd68821f9bebcd6a25bac94 SHA-1: 6e32fa85183b7057fb7dacce12cee0fd8ec63f91 SHA-256: 97815cc31e6d8816ac2ba1de623d6101afd845cdafa6cfd00e1dfd7816e848a9
154 Risk Score

Malware Insights

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

The PDF file contains embedded links that point to a redirector URL, which is a common technique for phishing and malware distribution. The document body, though heavily obfuscated, contains text that appears to be a lure related to "Cartersville police reports". The primary malicious indicator is the PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing on the URL https://ttraff.me/wix?keyword=cartersville+police+reports, which is likely used to deliver a secondary payload or redirect to a phishing site.

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/wix?keyword=cartersville+police+reports
    • https://cdn.shopify.com/s/files/1/0448/2557/5581/files/11893433205.pdf
    • https://cdn.shopify.com/s/files/1/0433/5108/1114/files/beautiful_disaster_wallpapers_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2459/files/bidayat_mujtahid_english.pdf
    • https://cdn.shopify.com/s/files/1/0441/1519/8104/files/81724895692.pdf
    • https://static.usrfiles.com/ugd/58a813_b18272084ec34af2be4230fde4d811e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ad2c6d186d241708bee8ee9f35fc233.pdf
    • https://static.usrfiles.com/ugd/b52961_344766bb546a46ce988a9e49268e1f4a.pdf
    • https://static.usrfiles.com/ugd/f14cf6_2f01f0fc5067439bb98a39ca5f8605ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_d424ac2844b1474390a801dd8b290f2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_029771cc94794afeb1f2d724146955ac.pdf
    • https://cdn.shopify.com/s/files/1/0431/1505/3213/files/venetian_macau_limited_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/vazowijoxawoposoru.pdf
    • https://cdn.shopify.com/s/files/1/0465/5493/9542/files/pap_smear_guidelines_asccp.pdf
    • https://cdn.shopify.com/s/files/1/0434/3857/1670/files/wolituzifupetedefuwox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.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_off0000612c.bin
e4674f8c064a8090a429128fc799fa6f0af00ab2d5300423026d775b76823db1
pdf-font-stream PDF embedded font (sfnt) at offset 0x612C 4892 bytes
font_01_sfnt_off000071e3.bin
47b36716a6ae8e1f14aae8a4637c4b5cfcb636e5b9bb34bb86daae3280846092
pdf-font-stream PDF embedded font (sfnt) at offset 0x71E3 10864 bytes