Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ef5b3c8529a016…

MALICIOUS

PDF

41.3 KB Created: 2020-08-06 23:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d88e48ed83accba0fe4acfc340171e2 SHA-1: 810ba309c0da1fd24d7d4c3c988da0043c9e70fc SHA-256: d5ef5b3c8529a0162af9cf7ca3f3dc469981a663c6e21c7cfc512418a6e40c84
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL. This suggests the primary goal is to lure the user to the malicious site, likely for phishing or to download further malware. The presence of numerous other PDF links points to a link farm strategy.

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/pify?keyword=betacaroteno+beneficios+pdf
    • http://files.birthandmotherearth.com/uploads/1/3/0/9/130969507/3249177.pdf
    • http://files.islamiccenterdm.com/uploads/1/3/0/9/130969153/wetedadosaval.pdf
    • http://wejuleba.ajcollectablecards.com.au/uploads/1/3/1/6/131606552/kovewupope.pdf
    • http://files.tanheathhunt.com/uploads/1/3/1/4/131453657/d7770.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/44478132741.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/44861487020.pdf
    • https://cdn.shopify.com/s/files/1/0438/8611/7019/files/assembly_hello_world.pdf
    • https://cdn.shopify.com/s/files/1/0428/8200/7199/files/12021979646.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8515/files/break_even_analysis_formula.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3022/files/database_systems_an_application_oriented_approach.pdf
    • https://cdn.shopify.com/s/files/1/0431/2511/2994/files/avl_tree_java_code.pdf
    • https://cdn.shopify.com/s/files/1/0434/7170/0120/files/99126817558.pdf
    • https://cdn.shopify.com/s/files/1/0436/0955/5107/files/94159975170.pdf
    • https://cdn.shopify.com/s/files/1/0434/7111/0308/files/intel_hd_graphics_3000_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0439/0528/6296/files/banizutakofolaxaje.pdf
    • https://cdn.shopify.com/s/files/1/0435/8946/8328/files/jigazixufimipomukad.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_off000060e0.bin
dd59b4944d44a861ebea9e854cb31de32e060c00a36dd02fc12276c7157974ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E0 5308 bytes
font_01_sfnt_off000072f4.bin
2d275e6703845b1aee5bd2017b2ba2ae5ae7b344caabcfbaebbacc6dc037136d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F4 10980 bytes

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