Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6c07cdfad1e40c…

MALICIOUS

PDF

61.9 KB Created: 2020-08-24 10:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0153714f0335a1e61e8df04ec204757 SHA-1: 4253bbea2c915067b0016c7001c16d4d88ec2567 SHA-256: df6c07cdfad1e40c1503e090f69585565c33469f0f0a70702cdd9fb6492e6a1b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains but ultimately redirect to the malicious domain ttraff.ru. This indicates a link farm or redirection attack designed to obscure the final malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

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=aparato+digestivo+aves+pdf
    • http://laxun.doubledpicards.com/uploads/1/3/1/4/131453870/fixun_nojiketiwelibim_taxesegani_roxigotu.pdf
    • http://files.gordonptandwellness.com/uploads/1/3/0/8/130813888/rakajulewud-rebok-roxapowugifij-lupema.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pamuzinesikajojefex.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/tijimuvogutovupigo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0700/files/blue_mountain_state_season_1_720p.pdf
    • https://cdn.shopify.com/s/files/1/0428/6090/4604/files/new_riven_skin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54344474436.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/66092915217.pdf
    • https://cdn.shopify.com/s/files/1/0428/9966/9151/files/88238189205.pdf
    • https://cdn.shopify.com/s/files/1/0428/8079/4790/files/17036686786.pdf
    • https://cdn.shopify.com/s/files/1/0432/1656/8482/files/kenidekiwakubimis.pdf
    • https://cdn.shopify.com/s/files/1/0433/9164/7894/files/malidelakezejugin.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/57492589274.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000930b.bin
353a8aed845d82d85c0875890cb36b2a4bc8587a025d24dded68705335449a8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x930B 5228 bytes
font_01_sfnt_off0000a4ec.bin
3acea096ba0ba4dd67052e8d9f12ca39c1e6972e33d134968e0e03a546c943ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4EC 15488 bytes
font_02_sfnt_off0000d3fe.bin
43e84046d57c5d8edad47de9228ce36feb53c5e515436c294a71041590f3a3a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FE 16132 bytes