Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc072613b1b9210…

MALICIOUS

PDF

35.8 KB Created: 2020-08-26 22:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d5456ef2d9491d85eb8301841c520ae SHA-1: 617e0344aceb90075421df545f7a70997e6ed629 SHA-256: 5dc072613b1b9210da524ac6b178ef0af58a317efc1a1ab9d869a13e6c936046
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to symbolic logic questions and references the wkhtmltopdf tool, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm or SEO spam campaign designed to drive traffic to malicious sites.

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=sembolik+mant%25C4%25B1k+sorular%25C4%25B1
    • http://vubutux.crohnicallyblonde.com/uploads/1/3/1/4/131455158/nemizaxuxuxuteg_pibuxomibava.pdf
    • http://zokatel.artsybugqc.com/uploads/1/3/0/8/130813306/jiguzomipivud.pdf
    • http://files.learningthroughhorses.org/uploads/1/3/0/7/130740561/sotalepaf_labalopirogokib_xidetu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/smile_barbershop_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/crystal_agile_methodology.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/volobufepafolosovi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/lofulezuponoforidomi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5064/8223/files/livofefuvagetabeked.pdf
    • https://cdn.shopify.com/s/files/1/0433/7713/1683/files/quantum_chemistry_mcquarrie_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/java_break_out_of_for_loop.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4637/files/ds-_3053.pdf
    • https://cdn.shopify.com/s/files/1/0429/0225/7823/files/xoderolefasawugemobi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/94860990192.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/missile_wars_servers.pdf
    • https://cdn.shopify.com/s/files/1/0434/5485/7369/files/76825922776.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004afd.bin
80071c8bdb812922a41b674c820dd6f34420685511603e9185561ede0b978823		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AFD 5172 bytes
font_01_sfnt_off00005c71.bin
0565f4189596a7f34940d16c4af9c39d0797cac373dd519903db3eb536d0dc2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C71 11680 bytes

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