Malicious PDF — malware analysis report

Static analysis result for SHA-256 a717fc2f85cc0d5c…

MALICIOUS

PDF

45.1 KB Created: 2020-08-12 09:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d99d7e5cdd331187e94e613091bfdc31 SHA-1: 294be8149c32e7c6b80a070125310eb47740fb49 SHA-256: a717fc2f85cc0d5c3275d033223f7f36b7b3e2b81fa789dcafbfe5bbe6ba7b4a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at https://ttraff.ru/wb?keyword=guerrilla%20music%20marketing%20handbook%20pdf. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious content. The presence of many other PDF links further supports a link-farming or redirection attack pattern.

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/wb?keyword=guerrilla%20music%20marketing%20handbook%20pdf
    • http://files.clairesanimalaffinity.com/uploads/1/3/0/7/130740563/gaparu-mogusawexuxum-nolowatozafa.pdf
    • http://files.sharitavonsikphotography.com/uploads/1/3/2/3/132303378/d07ac2fcfd01.pdf
    • http://xavin.elslandscapeinc.com/uploads/1/3/2/6/132681670/wusiwidovi_gumomawiridodiv_degufuzigotu_tosetuvodopiw.pdf
    • http://files.breesepickel.com/uploads/1/3/2/7/132740892/pemiluzerineg.pdf
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/8029718435.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/15769323439.pdf
    • https://cdn.shopify.com/s/files/1/0435/2809/3856/files/68123110322.pdf
    • https://cdn.shopify.com/s/files/1/0435/4473/9999/files/khmer_math_book_grade_12.pdf
    • https://cdn.shopify.com/s/files/1/0429/1090/8572/files/3900941254.pdf
    • https://cdn.shopify.com/s/files/1/0431/3828/5725/files/captain_blade_s_manly_man_shield.pdf
    • https://cdn.shopify.com/s/files/1/0435/0309/1876/files/shareholder_definition.pdf
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/13174150405.pdf
    • https://cdn.shopify.com/s/files/1/0432/8246/4928/files/darafugavij.pdf
    • https://cdn.shopify.com/s/files/1/0435/0610/6528/files/zigorosuwobutifedesu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4206/8887/files/windows_localhost_file.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/sonny_ericsson_w580i.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/buriligif.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/wapolafofogojaj.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_off00006d37.bin
52cd7d3c3fd75f85d3c922599a3fc79a54410cd559b40d36647dab951bed381b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D37 5804 bytes
font_01_sfnt_off000080c8.bin
ad1a7b8ae465e86a2afa77a51487700e1957db9fe2ac895c2a2bc20613b18eee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C8 10856 bytes

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