Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a494916bf478b28…

MALICIOUS

PDF

42.7 KB Created: 2020-08-31 14:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a50f7b27eab1b7aec2cf16126e088b68 SHA-1: b905ad487d95b454ee7ec20ed210ca8094e5d2b7 SHA-256: 9a494916bf478b28f7c8e8d7b022d8c1fe26fa0bb68bb2ddf47ca059dc686205
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=bazaar+movie+hd+song'. Additionally, it features a large number of embedded PDF links, many hosted on shopify.com, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be user interaction with the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=bazaar+movie+hd+song
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/jeremy_bentham_philosophy.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/kofove.pdf
    • https://cdn.shopify.com/s/files/1/0432/1309/5073/files/55646999391.pdf
    • https://cdn.shopify.com/s/files/1/0435/8393/0527/files/padipibusakurozu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2512/0927/files/schneider_vivace_switches_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0438/4702/4805/files/kambalda_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/0631/2091/files/define_lined_baking_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8359/files/jinirogegolutomabebiwetow.pdf
    • https://cdn.shopify.com/s/files/1/0440/4147/0117/files/yearly_photo_calendar_template_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3602/files/fezimekiwakitupixasosipu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/vikings_orientation_capping.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/jurnal_biogas_dari_kotoran_sapi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/bergey_s_manual_of_systematics_of_archaea_and_bacteria.pdf
    • https://cdn.shopify.com/s/files/1/0432/7348/6496/files/galuloxipuripimufuzuj.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/fuzzy_analytic_hierarchy_process.pdf
    • https://cdn.shopify.com/s/files/1/0434/4587/8950/files/penotuwasorofinomu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/ketosis_diet_book.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/
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/k

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bed.bin
d02cd1b7aaa26b99b89bb81e8e4ac57684e2bd4c99c1e49a8ba6c32e140aefae
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BED 5076 bytes
font_01_sfnt_off00006d05.bin
f6c9afecda90176653a6eb954b4d8e9dc5207877c635b0a9b0737d7cfa86ed33
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D05 10164 bytes
font_02_sfnt_off00008fe8.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE8 4324 bytes