Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c28e5e5eec12358…

MALICIOUS

PDF

45.8 KB Created: 2020-08-19 08:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6472da3b293e157abb494a57e44eba53 SHA-1: ac55a6acec1f43a5e66f3d6781fb79f179ac5300 SHA-256: 4c28e5e5eec12358e9f4fad307442e6210b70fa3f57f43f72c3b9de7518e3a0f
140 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body and heuristics suggest a lure for downloading an executable file, potentially for a scam or malware delivery. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or to obscure the malicious redirector.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=checksur.+exe+tool
    • http://files.spiritbearservices.com/uploads/1/3/0/7/130775588/gokawurosezit_sinawuwuvefur_podivi_damabukexate.pdf
    • http://files.18q-adifferentkindofnormal.com/uploads/1/3/1/6/131606605/7703659.pdf
    • http://nazijolu.nicolettabuildingcontractors.com/uploads/1/3/0/8/130814328/ronovurevibemor.pdf
    • http://vixevol.kiriiku.com/uploads/1/3/1/6/131606349/zovotutoxogugux.pdf
    • http://files.hhnailstrips.com/uploads/1/3/1/6/131606262/9613797.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/rasevajitaxeku.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3026/files/6488052739.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/cad_soft_tools_dwg.pdf
    • https://cdn.shopify.com/s/files/1/0432/0005/3408/files/zisinorumel.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0875/files/sebixojedinobivewilif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/android_delete_google_account_from_phone.pdf
    • https://cdn.shopify.com/s/files/1/0432/6273/8592/files/list_of_bacterial_diseases_in_plants.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/39556871000.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/56912938362.pdf
    • https://cdn.shopify.com/s/files/1/0451/7848/6933/files/jogovuporuteve.pdf
    • https://cdn.shopify.com/s/files/1/0433/5720/8731/files/69486413348.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_off000068bd.bin
818c986ae0a48b5a8d09dbad607313687cfc4f60b743192b7384f77a81bbed58
pdf-font-stream PDF embedded font (sfnt) at offset 0x68BD 4592 bytes
font_01_sfnt_off0000787b.bin
1c610b27eb59767544bf1ea95fc60691fdea0da79960a542f5ba40b023dca88d
pdf-font-stream PDF embedded font (sfnt) at offset 0x787B 10416 bytes
font_02_sfnt_off00009c1e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C1E 4324 bytes