Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00484464d9f611d…

MALICIOUS

PDF

62.9 KB Created: 2020-10-16 13:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29e0812d1d972eaa25531569c525883d SHA-1: a82eed71fe3b1d6ae0bb152096ab4f22f162d8d1 SHA-256: b00484464d9f611d74a2a08e2d5d76e3602cb52128719af93e49efd6b499061b
130 Risk Score

Malware Insights

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

The PDF file contains a link farm and a specific malicious redirector URL. The document body, though heavily obfuscated, contains text related to 'differential equations problems solutions pdf' and the malicious URL itself, suggesting a lure to trick users into clicking for information. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating a phishing or redirection attempt. No scripts were extracted from this sample.

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.link/123?keyword=differential+equations+problems+solutions+pdf
    • https://cdn-cms.f-static.net/uploads/4369146/normal_5f87a8fc99d33.pdf
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f87608ba1e97.pdf
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f87078e9b3e3.pdf
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f874af443142.pdf
    • https://cdn-cms.f-static.net/uploads/4369794/normal_5f884685d0d22.pdf
    • https://uploads.strikinglycdn.com/files/7683360a-9fcd-4d0b-ae26-4f13d8b0ea24/96680043919.pdf
    • https://uploads.strikinglycdn.com/files/920ef95e-32cc-4456-93a1-4f11879c5049/jokorosowop.pdf
    • https://uploads.strikinglycdn.com/files/2bf39220-e56f-48cd-82b5-7b9d6907083a/28629978614.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9025/files/83058075291.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/either_or_fallacy.pdf
    • https://cdn.shopify.com/s/files/1/0486/0775/6448/files/xibanagufejujepil.pdf
    • https://cdn.shopify.com/s/files/1/0435/2924/0727/files/tom_green_county_jail_san_angelo_texas.pdf
    • https://cdn.shopify.com/s/files/1/0498/0002/0130/files/30497490340.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8515/files/2728296125.pdf
    • https://cdn.shopify.com/s/files/1/0494/9878/3902/files/realm_grinder_r16_research_guide.pdf
    • https://cdn.shopify.com/s/files/1/0476/9595/4076/files/88131956169.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7191/files/gazemubuxefisevava.pdf
    • https://uploads.strikinglycdn.com/files/084f3925-da88-44da-b3d4-ee48c713012c/71638653793.pdf
    • https://uploads.strikinglycdn.com/files/de1a6eb4-806e-4a29-ae1d-7c74ac4e855b/51850901574.pdf
    • https://uploads.strikinglycdn.com/files/b152539e-4da8-4faa-855c-a03b65f1399e/77965545340.pdf
    • https://uploads.strikinglycdn.com/files/5bd43825-ac07-4a9b-b28d-88147e81a47f/84692665034.pdf
    • https://uploads.strikinglycdn.com/files/916209c0-4a66-481e-980a-67433d26bf76/95890809729.pdf
    • https://uploads.strikinglycdn.com/files/a6ddf006-2107-47a8-bc63-7cb30c56b4b3/tuzakuwejuzaxug.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_off0000b78a.bin
99ab542177371c03cc8d0daf7cf9525b89517abc174224c9b264a3def90d9100		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB78A 5452 bytes
font_01_sfnt_off0000c9f4.bin
92ac6ccbdf4fb9df4a9bd22431cd0106e71c5ab1196113744335ba13d817711b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F4 10408 bytes

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