Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd71d25779796b0…

MALICIOUS

PDF

40.7 KB Created: 2020-08-24 00:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 298c5916aaeee6d51e8ac8dc88f2359c SHA-1: 2b165df2908dff209bd665d91030adefe74f4a23 SHA-256: cbd71d25779796b085f06872568b305cd3098aae744d96f4b0f519931a1e52f2
130 Risk Score

Malware Insights

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

The PDF contains multiple links, with one prominent link leading to a redirector that uses the keyword 'frontline commando ww2 mod apk latest'. This, combined with the heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK and the presence of a visual download button lure, indicates a social engineering attempt to trick the user into downloading a malicious application. The document body itself is heavily obfuscated but contains the same redirector URL.

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.
  • 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
  • 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.ru/pify?keyword=frontline+commando+ww2+mod+apk+latest
    • http://files.jorieberman.com/uploads/1/3/1/8/131872149/6136816.pdf
    • http://files.trlegacypartnership.org/uploads/1/3/1/3/131383727/nenakusedarefitim.pdf
    • http://files.kantishnaouterwear.com/uploads/1/3/1/6/131637419/6963786.pdf
    • http://files.youruniverseyoga.co.uk/uploads/1/3/0/7/130738751/vitogolav_wonuvosanelif_mupufadasemib_laridiz.pdf
    • http://files.catherinetrinkle.net/uploads/1/3/0/8/130874125/608214.pdf
    • https://cdn.shopify.com/s/files/1/0437/1618/2184/files/photo_editor_blur_background_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/2749/6087/files/bumoxudozevixodimururisax.pdf
    • https://cdn.shopify.com/s/files/1/0436/4143/8366/files/87721537220.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0025/files/62093667570.pdf
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/66843999565.pdf
    • https://cdn.shopify.com/s/files/1/0440/2262/8502/files/aliens_colonial_marines_technical_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/fairfields_primary_school_cheshunt_ofsted_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/men_at_work_overkill_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0440/4002/8325/files/nedevebusi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7863/8999/files/free_able_abstract_art_prints.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9137/files/96776462956.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/
    • https://cdn.shopify.com/s/files/1/0431/2127/9137/files/967

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d71.bin
bbd28627b67d823540452d41ff8777ce3367ddfec6442ab6e5bf4536e5fd3e17
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D71 5460 bytes
font_01_sfnt_off00007000.bin
4c1ed054b9522bd3f5a9b373fbb9b85a80dbe803cf3d002309a9d15340eb44ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x7000 11020 bytes