Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b6026ce44a02b9…

MALICIOUS

PDF

47.4 KB Created: 2020-08-07 02:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2a048038c9fc0325efb5ae2110b5ed8 SHA-1: d8c94b2f07354b47880eaef78b29021ff2405fd6 SHA-256: 01b6026ce44a02b9091ac676ba5b565e710961d358dbd4e435a3fda048e2fb51
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or content hosting strategy. While no scripts were directly extracted, the presence of numerous URLs and the malicious redirector link strongly suggest an attempt to lure users to malicious content or manipulate search engine results.

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=marxisme+dan+agama+pdf
    • http://files.fireofdawn.com/uploads/1/3/0/7/130775893/zudopaniti.pdf
    • http://files.ashleighnicoleevents.com/uploads/1/3/0/9/130969440/tifedeniwe-lijemawipafi-dumadutugubiw.pdf
    • http://bikugawi.bunscoilmitchelstown.com/uploads/1/3/0/9/130969742/gerubotowapa.pdf
    • http://gowisomu.welldressedmamma.com/uploads/1/3/1/4/131453870/a636e74e80.pdf
    • http://mujuwux.kcgpediatricpt.com/uploads/1/3/1/4/131406390/206d5db2085c1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/gasuwitofuba.pdf
    • https://cdn.shopify.com/s/files/1/0431/5611/1520/files/94671715158.pdf
    • https://cdn.shopify.com/s/files/1/0431/7557/5709/files/alphabtisation_fle.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96512150342.pdf
    • https://cdn.shopify.com/s/files/1/0428/8839/6959/files/vivawelebekovover.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/25411973236.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/fipifasukexazevixol.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/93089781164.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8428/files/kujuwidutizadis.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/81703377571.pdf
    • https://cdn.shopify.com/s/files/1/0434/1393/0142/files/juninuxexeje.pdf
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/66358876878.pdf
    • https://cdn.shopify.com/s/files/1/0432/6214/8763/files/pagimefefum.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_off00007baf.bin
2fc0408e62d6a09099a2206a37ddea75663fe13dc945dfed016f51b9b225394a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAF 5400 bytes
font_01_sfnt_off00008e0e.bin
4584a51b2f11f6b0c8f6a9ea364562b8938c02bcf237af4d90311812683dafc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0E 10140 bytes

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