Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec94abad0e1a087…

MALICIOUS

PDF

49.3 KB Created: 2020-08-09 10:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3206bf0e43af4ddf8f1ca00e3b8c4888 SHA-1: 45ade7d1d33d1fe1b8e3b7c974385e5c3fe8e73e SHA-256: 0ec94abad0e1a08724eeb25cb84b40d494eaf496a63c1992e759853204544f36
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate search results for academic papers, but the primary link redirects to a known malicious infrastructure. This suggests a phishing or scam attempt to trick users into downloading potentially harmful files. While no scripts were directly extracted, the PDF structure and embedded links are indicative of malicious intent.

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=satyanarayana+biochemistry+4th+edition+pdf+free+download
    • http://files.fearless-compassion.org/uploads/1/3/1/4/131438616/3f256d7480302.pdf
    • http://files.coloquioespanacee1979-2019.com/uploads/1/3/2/6/132696155/bizugaketubijupu.pdf
    • http://files.galleryodin.com/uploads/1/3/0/8/130813645/ganureke-pagezenodi.pdf
    • http://files.faubionmiddleschool.com/uploads/1/3/0/8/130874143/5327c939cf367.pdf
    • http://files.emarinstories.com/uploads/1/3/0/8/130813489/4009a8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/xetusuforen.pdf
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/rozosifexuwezenutekumoni.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/6390483808.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38684703775.pdf
    • https://cdn.shopify.com/s/files/1/0431/4382/3517/files/famovineragejuxozi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4847/5541/files/automatic_control_kuo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7674/files/32407444761.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74133662670.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/kimanufazas.pdf
    • https://cdn.shopify.com/s/files/1/0429/0641/9367/files/poxokafopuleran.pdf
    • https://cdn.shopify.com/s/files/1/0433/5285/0586/files/sajoxoxapodadebixomoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/zuwimirokowozafakixa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.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_off0000685e.bin
04be8aafddd6ba55fb53fdb54e33062710d0794858050d086018c9a2b99e82d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x685E 5920 bytes
font_01_sfnt_off00007c76.bin
83989fe25fc20dcaa0b8beb3307c194ab40aed05973d659d83be19a9aca76646		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C76 10440 bytes
font_02_sfnt_off0000a057.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA057 16164 bytes

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