Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc703fd83014252…

MALICIOUS

PDF

47.7 KB Created: 2020-08-21 01:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02e761706e7b6f2eb97614c58c7ebf6f SHA-1: 62712b71cf12153aadd1e3f050403e3ea6c7219a SHA-256: 0dc703fd83014252ed3045c3fa3d32b3dbfd0fa421d8581ffc6087c3146758fa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'Tamilrockers movie site', suggesting a lure. The presence of numerous embedded links, many pointing to PDF files, indicates a link farm designed to distribute malicious content or redirect users. No scripts were extracted, but the primary attack vector appears to be the malicious URL.

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.ru/pify?keyword=tamilrockers+movie++site
    • http://zazujo.aerialimages-photo.com/uploads/1/3/0/7/130776177/94e327d498b4.pdf
    • http://jodin.briahfashions.com/uploads/1/3/1/3/131380600/ranunasa.pdf
    • http://files.moirajo.com/uploads/1/3/2/7/132710655/6052939.pdf
    • http://files.energizecolleges.org/uploads/1/3/1/0/131070611/cc21ae80.pdf
    • http://files.fauxmesticgoddess.com/uploads/1/3/1/8/131856381/gevaxil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0428/5110/6972/files/71949672960.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/2448856408.pdf
    • https://cdn.shopify.com/s/files/1/0430/8529/9874/files/schumann_acculturation_model.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/wizet.pdf
    • https://cdn.shopify.com/s/files/1/0432/6791/5936/files/45846393435.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/tijoxixanezogotuxunaved.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/75149841368.pdf
    • https://cdn.shopify.com/s/files/1/0437/1582/1717/files/romasajinijam.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/rorimixuxanovekoguzese.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdf
    • https://cdn.shopify.com/s/files/1/0434/7294/5312/files/70653160920.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000721e.bin
bf36ba069a924eced922f096d6837cb9f2dcca127fac87739e169f2c3ce306ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721E 5020 bytes
font_01_sfnt_off00008318.bin
2861136c8e399a904e9aee269bac74252f477632907a67fc5cbb880a054f5743		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8318 2976 bytes
font_02_sfnt_off00008e86.bin
1c9aa5eae1de5e41c746791491c2e259e93db05db8e1cf7516218b0581942a48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E86 10144 bytes

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