Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c1fe487c42ab03…

MALICIOUS

PDF

49.2 KB Created: 2020-08-10 06:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 875658d2c5f41902d891903a001e3aaa SHA-1: 698a83a08d95d218b21df456ed9a08c774fbdf3c SHA-256: b6c1fe487c42ab030f308b8aa1a56f36b744ca95f74db1ebb6e97d6f4ea7ad1b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. This suggests the document is designed to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting. No scripts were extracted, limiting the analysis of direct payload execution.

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.cc/pify?keyword=second+conditional+exercises+multiple+choice+pdf
    • http://files.dgchallenges.com/uploads/1/3/0/9/130969801/184e84.pdf
    • http://nosanu.spcwaterdistrict.com/uploads/1/3/0/7/130738696/minamol.pdf
    • http://files.doodledogs.org/uploads/1/3/1/0/131070718/8640373.pdf
    • http://files.thecivicexperience.com/uploads/1/3/1/4/131454034/7899425.pdf
    • http://pazig.mypeoplecommunity.org/uploads/1/3/1/6/131607062/tawifitatojovakoxij.pdf
    • https://cdn.shopify.com/s/files/1/0437/3531/8689/files/70095617340.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6250/files/ge_washer_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/4633/0791/files/sibilapugebonuwiliwujined.pdf
    • https://cdn.shopify.com/s/files/1/0438/4679/5424/files/apache_lucene_indexing.pdf
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/popaxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6863/7862/files/79705079692.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/convert_to_text_python.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/80363339663.pdf
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/73215321682.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jibivugutujul.pdf
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/boretuminabizunaxuni.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/gevikuzetesid.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_off00008389.bin
45b783137eda381c2770d653a4365ef9542ee7d0eb5f0e93c5334a1fb00a2388		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8389 5564 bytes
font_01_sfnt_off00009653.bin
d6a6ab693686ba297a2b8f00b7decb32859a3c1689377e9feb8bb7cc374afcb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9653 9764 bytes

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