Malicious PDF — malware analysis report

Static analysis result for SHA-256 93df1671156fdae8…

MALICIOUS

PDF

43.2 KB Created: 2020-08-06 17:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b13984be77fb30b1f99f24d1d6c4ea53 SHA-1: c73d25ccc68cb5f2b996b16dd3560a30609e2484 SHA-256: 93df1671156fdae81a3a028cb8693d8b51f104904b6d53530ed401f41cebcca8
128 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which is a known malicious redirector. The document body and heuristics suggest a lure related to payroll and accounting applications, intended to trick the user into clicking the malicious link. The presence of a link farm further indicates a phishing or malicious redirection attempt.

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=payroll+and+accounting+applications+pdf
    • http://molujiten.9footvoice.com/uploads/1/3/0/7/130776407/jirefegazasebun-wumonifuxu-dafuvonot-kegidijemasovad.pdf
    • http://files.elmhurstelitetutoringplace.com/uploads/1/3/1/6/131606745/jizun-bomofola-rasediz.pdf
    • http://files.windsweptwillow.com/uploads/1/3/0/7/130740571/4c9ca.pdf
    • https://cdn.shopify.com/s/files/1/0438/3480/2333/files/benixukigetezegatomamow.pdf
    • https://cdn.shopify.com/s/files/1/0437/7817/9221/files/25657869683.pdf
    • https://cdn.shopify.com/s/files/1/0434/6583/4658/files/bekupitibiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/11604928321.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/tavujoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3844/0598/files/55027308288.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/36070341595.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/desumubepuve.pdf
    • https://cdn.shopify.com/s/files/1/0437/0602/4101/files/kegedolula.pdf
    • https://cdn.shopify.com/s/files/1/0434/8080/9625/files/biregarezuzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/23274340519.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_off000069b4.bin
b53d573ff11f133227aac11e870a396294addac0a28127c9e7a32cb2e3f79a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B4 5428 bytes
font_01_sfnt_off00007c47.bin
51a0dbd19f3b6fd304c18a818c91d5c6819d4f71acc465825f97be7941f0cf13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C47 10536 bytes

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