Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a5bcc69f6d1588…

MALICIOUS

PDF

59.3 KB Created: 2020-08-11 20:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d508652dad001d3099277a657e1a0545 SHA-1: 7f263dff19bafc4dacaa8b004166067321e26184 SHA-256: 29a5bcc69f6d1588e46af4250f34a4b1c1b609dbf153b0708c1d0edbb2d20dd5
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains text related to academic papers and the redirector URL itself, suggesting a lure to trick users into clicking the link. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm designed for SEO manipulation to attract victims.

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=skripsi+kuantitatif+pendidikan+agama+islam+pdf
    • http://ragosom.ladedo.com/uploads/1/3/2/7/132712207/8086697.pdf
    • http://files.clevelandresearchcareers.com/uploads/1/3/2/7/132740930/3fe6b40d.pdf
    • http://files.hqrecordingstudio.com/uploads/1/3/1/4/131437924/aa6751fb.pdf
    • https://cdn.shopify.com/s/files/1/0433/1080/9256/files/british_idioms_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0435/6472/8479/files/nitro_pro_7_to_word_converter_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8138/files/introduction_to_zoology_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/9382/6463/files/petusonizipixetuma.pdf
    • https://cdn.shopify.com/s/files/1/0434/0393/5902/files/gedodominono.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/terodati.pdf
    • https://cdn.shopify.com/s/files/1/0429/4089/1292/files/gevekidorekunokerow.pdf
    • https://cdn.shopify.com/s/files/1/0436/9137/6794/files/wuvilavokazukibe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3615/5809/files/87483332432.pdf
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/watson_glaser_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/7530/4612/files/counter_strike_1._6_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6088/7705/files/zegimezabakewotofekoxug.pdf
    • https://cdn.shopify.com/s/files/1/0436/0726/1341/files/repazavejo.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_off00009d5e.bin
d6625c72a50ee281e7e2441986e5faa24288e0302f2ab14a2453e14d29183eed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D5E 5300 bytes
font_01_sfnt_off0000af41.bin
83ccf136e33313269da5c56001da180fa46fa8a3ed927a64e1780b0e20cf9f79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF41 10188 bytes
font_02_sfnt_off0000d19f.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD19F 4324 bytes

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