Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cb5a791aa15be07…

MALICIOUS

PDF

42.7 KB Created: 2020-08-18 15:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf0cb1030614cca1a45d111201a5444b SHA-1: 3fdaf1fc8ed738830551a770232df57f9a825baa SHA-256: 4cb5a791aa15be077bc8db36f31f9c8a5be6ee15519f4827ba2edc07da52d296
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a translation invoice template. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute further malicious content. The presence of a malicious redirector link and the invoice lure strongly indicate a phishing or social engineering attack.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=translation+invoice+template+word
    • http://budodux.westchaseassociation.com/uploads/1/3/1/0/131070872/wojobusuf_wekuno.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7670/files/bundesliga_spielplan_18_19.pdf
    • https://cdn.shopify.com/s/files/1/0438/2362/8450/files/vowekalixalasefege.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0012/files/baal_shem_tov_stories.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/change_of_address_form_dmv_wv.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/nuwave_pro_infrared_oven.pdf
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/how_to_check_gpu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/basugogigarerebid.pdf
    • https://cdn.shopify.com/s/files/1/0435/3291/0751/files/kikelutomeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/collateralized_loan_obligation.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/fapef.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_off00006a28.bin
237970b5a49d06dc1dad17f32ceb3945c38ab0dbea0e8c731e5892be6310cc1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A28 5320 bytes
font_01_sfnt_off00007c35.bin
cc8be4a59c930dfd997d074cfb9441ac0c7f39ef0e32142fec37935705a4acf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C35 10020 bytes

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