Malicious PDF — malware analysis report

Static analysis result for SHA-256 acdd7f1c61109c75…

MALICIOUS

PDF

33.7 KB Created: 2020-08-11 12:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ced61cd844cb65896ca9dceb09062413 SHA-1: 2f893277edcda80e87894c5c229785e8c91272d7 SHA-256: acdd7f1c61109c750526f7fb9bffae111a854c4c7578c03ea6e9bf1dbec54139
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. This URL is embedded within the document body and also appears in the list of extracted URLs. The document also exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on cdn.shopify.com. The primary malicious link is designed to redirect users to potentially harmful content.

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=reparacion+y+bobinados+de+motores+electricos+pdf
    • http://gokukave.spirithorsetrc.org/uploads/1/3/1/3/131383657/1811005.pdf
    • http://mugos.pronino.org/uploads/1/3/1/6/131636725/9499317.pdf
    • http://jubamip.dukeschiropractichealthclinic.com/uploads/1/3/1/6/131606407/2055972.pdf
    • https://cdn.shopify.com/s/files/1/0436/1663/2992/files/normal_cdf_and.pdf
    • https://cdn.shopify.com/s/files/1/0433/8830/5575/files/liwenifadaraxejiwulob.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/31640033744.pdf
    • https://cdn.shopify.com/s/files/1/0435/0682/7428/files/mmpi_test_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/guia_ceneval_exani_ii_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7068/files/ponceau_stain_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/nixesoxololavajoma.pdf
    • https://cdn.shopify.com/s/files/1/0434/7002/8966/files/lalolizot.pdf
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/38562988165.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0358/files/erros_na_administrao_de_medicamentos.pdf
    • https://cdn.shopify.com/s/files/1/0444/3108/1639/files/instant_house_mod.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/88176417818.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/fuvadulet.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047aa.bin
2a2e5af7e6738e6f6df85318118607be0e9247c0342af45a93fc564017e6d74e
pdf-font-stream PDF embedded font (sfnt) at offset 0x47AA 5548 bytes
font_01_sfnt_off00005a6f.bin
ec36d6a7c92457f1409f3577cede6ae28b75dac8e141da2658c4c9e2761dc71f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6F 9076 bytes