Malicious PDF — malware analysis report

Static analysis result for SHA-256 70bd5cccc4153e45…

MALICIOUS

PDF

58.6 KB Created: 2020-10-26 05:48:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9a0383049fb72241b22e3cfe13669efc SHA-1: 78bd76177b42246ea4541ee53f2b1de1812dd804 SHA-256: 70bd5cccc4153e4550e3ee445ec7a5ff5de33b20c093fbad203252e9c31608c3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many of which point to external resources, suggesting a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://gettraff.ru/aws?keyword=centrifugal+pump+design+and+application+pdf In PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/9042864.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/novikipanefi_vodunibuxez_tixowugivanigis.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/954539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5f8d3af2e2597.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5f9511501675b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6572/8920/files/40972832398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5068/7422/files/launch_x431_v_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6444/9431/files/nested_recyclerview_android_example_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45705d60-5418-4a80-a459-880852536fac/63051997057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34974eca-bf7d-4269-b690-046d4c4da791/vijutipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4685/3016/files/piaget_and_vygotsky.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0315/3048/files/bubatejideji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/2702/6079/files/vebakunipifijobokonexaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5208/8477/files/71338756338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1d0643-7ed0-435c-9f62-401cf338a900/31906002406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c84d2c-1fc6-4b31-824b-e7ebde17e3f5/nokumofojolibesagewowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af731e6b-f5e9-4c92-8aa3-9e5ab28ad8fd/97560427747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cd003aa-a237-4cab-b22c-60fe0c5b5977/51541051483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a010d9-ba7a-4e65-aa84-c5fea00bd8ec/mmento_police_route.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA569 5380 bytes
SHA-256: 2d4347874db311fafcb7aad4806571139f465ac9a76a71fe69ef11723a29b64d
font_01_sfnt_off0000b793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB793 11064 bytes
SHA-256: 3cd60af3143ecc5f3c9e9b9cb38ba7df5a26f94c5b89000a250a3dac7f347064

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