Malicious PDF — malware analysis report

Static analysis result for SHA-256 044fbe97fdd29352…

MALICIOUS

PDF

56.5 KB Created: 2020-08-09 10:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b36cea4000b78d87e039b8d6f1a011e SHA-1: 63cace109ee0b6a59ac82cb109c2f1aa1b7b711e SHA-256: 044fbe97fdd2935279422e4378218714d8953547fa3f53fc8b67d88fdea13fe8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'assignment problem in or pdf' and includes the malicious URL. This suggests a phishing or scam attempt where users are directed to malicious infrastructure.

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.cc/pify?keyword=assignment+problem+in+or+pdf
    • http://files.heathergeoffrey.com/uploads/1/3/0/9/130969357/monowekiputofe.pdf
    • http://nipotigo.rtprogram.com/uploads/1/3/0/9/130969332/969889eb93.pdf
    • http://files.country-charms.com/uploads/1/3/1/4/131437246/figotuvajigi_xagejogepetomiw_lidaz_wewazusa.pdf
    • http://files.stanza2reason.com/uploads/1/3/1/8/131871643/43e7df268a9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/zewigalemo.pdf
    • https://cdn.shopify.com/s/files/1/0438/0586/8193/files/your_perfect_right.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/fologakudura.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/satefolizilozub.pdf
    • https://cdn.shopify.com/s/files/1/0429/4436/4710/files/90359533159.pdf
    • https://cdn.shopify.com/s/files/1/0439/0905/4619/files/44442169108.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6312/files/67143971242.pdf
    • https://cdn.shopify.com/s/files/1/0437/6212/2903/files/57901556552.pdf
    • https://cdn.shopify.com/s/files/1/0438/0416/4257/files/catalogo_truper_2020_con_precios_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/galobap.pdf
    • https://cdn.shopify.com/s/files/1/0433/7362/5500/files/59809915719.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8992/files/39389076547.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a59.bin
b01f5658cb91230bfeb8899db0633c98c88003c8a51758bed6fcdd7ec67b61cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A59 5068 bytes
font_01_sfnt_off00008b70.bin
4c25d85987e89331c75a077525664a6bca5172f63d2cf3bc8fccba08c32bfa5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B70 10736 bytes
font_02_sfnt_off0000b065.bin
a5deb14ee7e45d3ec5bf0547e0e0004dd1e6c5607b863884e1c52f9ab632b63d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB065 16256 bytes
font_03_sfnt_off0000c5e5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E5 4324 bytes

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