Malicious PDF — malware analysis report

Static analysis result for SHA-256 dda1bfc7ba34d603…

MALICIOUS

PDF

49.1 KB Created: 2020-08-14 11:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 713f4595e2a5a6d1fe06eb8ac677dcd2 SHA-1: 3d99c91c983c7807351d253d56bfb6221207af86 SHA-256: dda1bfc7ba34d60326b69f9f42b1cf24f17089552727bac9973b52895e2f1043
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The heuristic firings indicate this is a link farm designed to manipulate search results or redirect users. The document body is heavily obfuscated and contains the malicious URL, suggesting an attempt to lure users to malicious infrastructure.

Heuristics 3

  • 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.
  • 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/wb?keyword=automated%20manual%20transmission%20system
    • http://radujedu.teachartathome.com/uploads/1/3/0/8/130874232/1d5472e4750ae58.pdf
    • http://files.yellowstoneartboutique.co.uk/uploads/1/3/2/7/132740541/914458.pdf
    • http://files.thewestnewtonpizzahouse.com/uploads/1/3/0/7/130739122/2752566.pdf
    • http://files.medicalpapyrus.com/uploads/1/3/1/4/131453036/ff0a6a8a0a3f54.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/57853872133.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1285/files/27897800622.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5351/files/cog_of_battle_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0431/4313/5393/files/v_for_vendetta_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/6268499064.pdf
    • https://cdn.shopify.com/s/files/1/0433/5386/6408/files/abnormal_behavior_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0435/6338/4991/files/dulux_paint_colour_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/minirefotapobizezuloxot.pdf
    • https://cdn.shopify.com/s/files/1/0435/7790/1219/files/cefr_language_levels.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0605/files/menewinuvizakat.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/71299510035.pdf
    • https://cdn.shopify.com/s/files/1/0434/6616/2341/files/minecraft_accounts_and_passwords_2017.pdf
    • https://cdn.shopify.com/s/files/1/0428/4062/1222/files/addams_family_musical_full_score.pdf
    • https://cdn.shopify.com/s/files/1/0441/0313/9480/files/audi_a4_2013_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007513.bin
4732dd1b5813fde193b3771252f5f97e792bcd071078c98fae6f840a87bd8bfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7513 4944 bytes
font_01_sfnt_off000085c5.bin
e80ea5c7e8844e0a2e0cd1bef24afd2fdbe56773a9799bddc917f8f36eaab48a
pdf-font-stream PDF embedded font (sfnt) at offset 0x85C5 10376 bytes
font_02_sfnt_off0000a933.bin
8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd
pdf-font-stream PDF embedded font (sfnt) at offset 0xA933 4324 bytes