Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ce1da39c5cae26…

MALICIOUS

PDF

41.5 KB Created: 2020-08-07 05:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af296993d1df575a706b532f0b5116ae SHA-1: d74caa67a49826385cfc0050c9de405b1a0abaeb SHA-256: 64ce1da39c5cae26a1cc66b1b941a0b506263e4834a8a5014266507d2ab406ce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'punnett square virtual lab worksheet' and a URL that aligns with the malicious redirector. This suggests the document is designed to trick users into clicking malicious links, likely for phishing or malware delivery.

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=punnett%20square%20virtual%20lab%20worksheet
    • http://files.avtarindiatours.com/uploads/1/3/1/4/131437702/3b588b4f9b.pdf
    • http://files.truehopehealthyliving.com/uploads/1/3/0/7/130775518/6642963.pdf
    • http://viren.windowwarehousedraperysupply.com/uploads/1/3/1/4/131437812/seretos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7900/7384/files/beethoven_biography_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/kojij.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4705/files/18125007811.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/94051028728.pdf
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/13817496457.pdf
    • https://cdn.shopify.com/s/files/1/0432/3462/3643/files/baganijixoniledosasa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18983443830.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/altronix_power_supply.pdf
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/gefewafozajod.pdf
    • https://cdn.shopify.com/s/files/1/0436/3363/9584/files/belivuxajumaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4460/0999/files/70376808261.pdf
    • https://cdn.shopify.com/s/files/1/0429/4495/4527/files/zimakowid.pdf
    • https://cdn.shopify.com/s/files/1/0436/2679/1075/files/laundry_symbols.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_off000062e4.bin
b3126dd26d529628303af37301496a6d2d693c5a7f55d99eb0203cb8eec17295		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E4 5256 bytes
font_01_sfnt_off000074d5.bin
a445e9afd3595bf9121cb1cc72c495ed8c695d4946afb5f64906fc6a06bbcb23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D5 10600 bytes

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