Malicious PDF — malware analysis report

Static analysis result for SHA-256 590e32bd13649415…

MALICIOUS

PDF

47.7 KB Created: 2020-08-01 06:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8de9fbdb64d4172846d07c3eca50618 SHA-1: 9651cab902502c44e8468fc9675e9d349a102bb7 SHA-256: 590e32bd13649415c53bb7bfc8fb99b538059d3316b0cfb14eadfeedaf76e8a4
152 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with the primary one being a redirector to 'https://ttraff.ru/pify?keyword=free+hindi+serial'. This URL is flagged as malicious, indicating a phishing or redirection attempt. The document body, though heavily obfuscated, contains the same lure text and URLs, reinforcing the malicious intent. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content.

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=free+hindi+serial
    • http://files.sanpeteseamless.com/uploads/1/3/0/8/130873728/899cb64bdc5acb.pdf
    • http://files.chinasummercamp.org/uploads/1/3/2/3/132302759/pifonimanonisej.pdf
    • http://files.poetrypedagogy.com/uploads/1/3/0/9/130969907/5989116.pdf
    • http://files.dsdprofessionaldevelopment.com/uploads/1/3/0/8/130815437/mariv_rufisuzekefije_pogibifubiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/zokelajurupipebeza.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/najasegetutonibakijavaju.pdf
    • https://cdn.shopify.com/s/files/1/0429/7572/3673/files/white_hex_color.pdf
    • https://cdn.shopify.com/s/files/1/0432/1050/6404/files/tavumawimin.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/wajonewoxavi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1595/4855/files/fofuvemojokivulasave.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/74405314271.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/dofuxoro.pdf
    • https://cdn.shopify.com/s/files/1/0433/2791/4152/files/26833210613.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/75747781753.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_off0000716d.bin
e047ae0a311dce6c7a187c50ae3237a55fd4b81855d9a93dc7c9997e66c1a79d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x716D 4468 bytes
font_01_sfnt_off0000806b.bin
ca821b7ca5ed8b4ce06f5cb201f5f6986043f05aaa87a81139b87a7d40954c61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x806B 10284 bytes
font_02_sfnt_off0000a381.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA381 4324 bytes

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