Malicious PDF — malware analysis report

Static analysis result for SHA-256 7820272ae349f927…

MALICIOUS

PDF

48.9 KB Created: 2020-08-14 16:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 671a253e42ae2f83dd8dbe73cbec92e0 SHA-1: d1aa614000eab3b3321eeab324b891da897567a6 SHA-256: 7820272ae349f927b37e679060940de1c9d1bb3293a8ea8d5c4f3de50870580a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files, suggesting a link farm or SEO abuse tactic. One prominent URL, https://ttraff.ru/pify?keyword=blue+cross+blue+shield+louisiana+provider+manual, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating an attempt to lure users to malicious infrastructure. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest a phishing or malware distribution attempt.

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=blue+cross+blue+shield+louisiana+provider+manual
    • http://files.financiallyfreeteacher.com/uploads/1/3/1/3/131380564/ade8e7b3.pdf
    • http://files.tomboulian.org/uploads/1/3/0/7/130739886/5a01a.pdf
    • http://nezasuk.androsoutdooradventures.com/uploads/1/3/2/8/132814989/bizibuzirid_bazemeruw.pdf
    • http://files.heritagemedalservice.com/uploads/1/3/1/8/131856852/zegupiviw.pdf
    • http://files.telfairelementary.com/uploads/1/3/0/9/130969026/bd94f2cf036.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/kipajida.pdf
    • https://cdn.shopify.com/s/files/1/0428/7964/7903/files/nepavozowibev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fikikotiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1555/files/8551342448.pdf
    • https://cdn.shopify.com/s/files/1/0438/0930/8829/files/23875978095.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/77257196369.pdf
    • https://cdn.shopify.com/s/files/1/0437/4193/7818/files/35677963652.pdf
    • https://cdn.shopify.com/s/files/1/0431/5620/9819/files/adding_unlike_mixed_numbers_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lokilus.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6971/files/92919145697.pdf
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/histoire_de_l_orthographe_franaise.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/arap_bahar_tunus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sazofafusogowo.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b8f.bin
a1db8cdf9053601c9fedf845641b07e236d601509833f6fb7724aaacce9f11c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8F 5560 bytes
font_01_sfnt_off00007e47.bin
e1aaf69e9d6104113cc3e8a8020ae638b3e06ca78457534068f8dc85f9cf7c21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E47 9852 bytes
font_02_sfnt_off0000a053.bin
d8949076153b506d0263e7f774c3afe225f31c34230a03cbf93bb85259a13da0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA053 16232 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.