Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5185d1c229ff4a6…

MALICIOUS

PDF

44.0 KB Created: 2020-08-20 14:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8c48a0ccde316af6fb98f25c69d80b4 SHA-1: 0fa85998445900e4a6a8b7be44fbf16a452df260 SHA-256: b5185d1c229ff4a6bccaa0d5fb91eaa16e719d5f2750438c1bc07d1e761f4dca
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious URL. The document body, though heavily obfuscated, contains text related to 'Apple and android pay limits' and the URL itself, suggesting a lure to trick users into clicking on malicious links related to payment information. The presence of a malicious redirector link and the link farm structure strongly indicate a phishing or scam 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.com/pify?keyword=apple+and+android+pay+limits
    • http://files.housefinchinvestors.com/uploads/1/3/2/6/132682787/relufat.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2343/files/luwasolepoku.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/cultura_geral_em_angola.pdf
    • https://cdn.shopify.com/s/files/1/0431/8973/1479/files/begumipepir.pdf
    • https://cdn.shopify.com/s/files/1/0438/3493/3408/files/1454189325.pdf
    • https://cdn.shopify.com/s/files/1/0435/3762/9348/files/noreweluxogutukepuzerukaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46287179129.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13908697451.pdf
    • https://cdn.shopify.com/s/files/1/0436/6693/1862/files/pudemomalurakujax.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/13697648023.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/84994779253.pdf
    • https://cdn.shopify.com/s/files/1/0429/9866/1279/files/zadumitopurasuvibimapi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8443/2031/files/dopimimupowevovavor.pdf
    • https://cdn.shopify.com/s/files/1/0437/1388/8405/files/can_t_let_go_novel.pdf
    • https://cdn.shopify.com/s/files/1/0437/2535/7206/files/ampere_s_circuital_law_proof.pdf
    • https://cdn.shopify.com/s/files/1/0431/2550/6208/files/51587064597.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_off00006e05.bin
da61a06369038fda7a552dbdc3510d80dd226aafd0869c4f8ae5442f36f44574
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E05 5196 bytes
font_01_sfnt_off00007f98.bin
d068b899cd094dd41908052f0d8f95ed03628e8a9d5de1503f37480ffbcc6490
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F98 10524 bytes