Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3e0f63971565adf…

MALICIOUS

PDF

52.0 KB Created: 2020-08-17 09:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b00f75980a72d251aefec679bb95a9d9 SHA-1: 68ba3019c2fd4d53844c151d86b041c1b34ba29b SHA-256: b3e0f63971565adfbac50bb77434d02edd35558c0bbafc594bd11f5e0b7bb3fa
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one pointing to 'ttraff.ru', are indicative of a phishing or redirection scheme designed to lead users to malicious content. No scripts were extracted, but the PDF structure itself is the delivery mechanism.

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=ectoderm+mesoderm+endoderm+formation
    • http://dulanotuv.cindyhammondfineart.com/uploads/1/3/0/7/130738943/64c64f47fce8036.pdf
    • http://files.lizguilmet.com/uploads/1/3/0/7/130775045/jilamudoka_segekewirape_zewofemek_waravalenimap.pdf
    • http://files.lucypole.com/uploads/1/3/0/7/130739826/5781844.pdf
    • https://cdn.shopify.com/s/files/1/0435/2091/7668/files/bivudodibakevadofez.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vinujavezo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/92270717261.pdf
    • https://cdn.shopify.com/s/files/1/0438/9496/4392/files/b_type_blood_group_diet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7078/2624/files/venus_fly_trap_care_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/xovipunelovadok.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1416/files/28429837898.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/victory_over_the_darkness.pdf
    • https://cdn.shopify.com/s/files/1/0431/5529/2321/files/17586466186.pdf
    • https://cdn.shopify.com/s/files/1/0436/9701/2890/files/waroxefe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6727/files/gavobegatuw.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/sipivuwobaperet.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_off00008f04.bin
5792b16d0fa9677ef20d799e27b4ac3f1437c5b1b6e246d626f9acc29b1f9210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F04 5092 bytes
font_01_sfnt_off0000a036.bin
c52215c93f0d57005d1d0262f1652c1298c8667cf6c89621a267670e795e270a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA036 10156 bytes

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