Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd037d04f43a44f9…

MALICIOUS

PDF

48.7 KB Created: 2020-08-21 08:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 315230482cb168730b441614318b7c66 SHA-1: 4d04c9e0fe73e68c4d62a48b33a04b86d83256bf SHA-256: bd037d04f43a44f9c8e9b41063c790e838ea8f66d0863608fa868870efb06941
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The primary intent appears to be directing users to the malicious 'ttraff.com' URL, likely for further exploitation or phishing.

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.com/pify?keyword=books+to+read+online+pdf+free
    • http://files.thompsonsteamer.com/uploads/1/3/0/7/130776239/7fa88518c7.pdf
    • http://larujino.oneontacofc.org/uploads/1/3/0/8/130814328/7288026.pdf
    • http://files.cnsbeauty.com/uploads/1/3/1/3/131379680/9125998.pdf
    • http://pujevim.metropolitanreport.com/uploads/1/3/0/7/130774965/pekudor_tuxipa.pdf
    • http://files.aslightmistakeinthecode.com/uploads/1/3/2/8/132815206/feseba.pdf
    • https://cdn.shopify.com/s/files/1/0437/5642/1269/files/building_planning_drawing_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/59567042236.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/64219808307.pdf
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/zemoniralamegek.pdf
    • https://cdn.shopify.com/s/files/1/0432/8872/3616/files/82434378811.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/66729989694.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9675/files/8939683427.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/templated_linked_list_c.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/tmux_start_session.pdf
    • https://cdn.shopify.com/s/files/1/0436/9442/4232/files/70527907395.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/27607831088.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/lorivinosolunitaxubi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2871/files/variance_example.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_off00007215.bin
431bc05923fd385bfa7f916d9bdd996d431ce598ad95de863593f698b24dbbfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7215 4936 bytes
font_01_sfnt_off000082e4.bin
5a135f7768691373ea5ae9eabec21a5bfd13c37b7d55ef76fd262bacf3f35a99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82E4 10732 bytes
font_02_sfnt_off0000a795.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA795 4324 bytes

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