Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfde43ac3f2c0d88…

MALICIOUS

PDF

49.9 KB Created: 2020-11-01 16:18:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cf7e679aba6749bf647427facf859d7c SHA-1: bddb977141b0f03a46d27edf358214171d949982 SHA-256: dfde43ac3f2c0d8830ba011cd28472c4450af854f6f6451baf4273f029dd79b2
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ggtraff.ru', which is also present in the document body. This link is likely intended to lead users to a phishing or malware distribution site. The presence of numerous other links, many pointing to benign Shopify URLs, suggests a link farm or SEO poisoning attempt to disguise the malicious intent. No scripts were extracted, but the primary malicious function appears to be the redirection via the embedded link.

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://ggtraff.ru/aws?keyword=new+movie+download+sites+free+no+sign+up In PDF document text
    • https://koxarakofawel.weebly.com/uploads/1/3/4/3/134310925/4770005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369343/normal_5f89d881023a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412173/normal_5f93579196b89.pdfIn PDF document text
    • https://pijezokonogoxa.weebly.com/uploads/1/3/4/3/134308979/lodida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410433/normal_5f9379b2e1361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f943ac6be4ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411229/normal_5f94475815f6d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5269/9300/files/most_common_connectors_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7464/7732/files/ziwatajerefome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3192/8730/files/dynamics_ax_2020_r3_retail_installation_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a379755-05a8-411c-b183-a95fb6696f8a/mesabawufutisunotipirebik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9067/1771/files/memonogapegupipugeruxokoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3839/0431/files/dajonuwitad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0248/8726/files/3912148991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f140c4ea-63fd-4a40-b276-31d8d045b784/vonelogibevasalat.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000773f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x773F 5364 bytes
SHA-256: 1905db2009248c3ee42549ce72a5b0e98f3e905c45c62941a14635115582a039
font_01_sfnt_off00008981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8981 10356 bytes
SHA-256: 92aa09d68f4a01a07b71a49971aa90b1edfb7c30902d551936536251fc5d0aa8
font_02_sfnt_off0000acb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACB7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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