Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7fcd6af05cab64…

MALICIOUS

PDF

93.6 KB Created: 2020-10-17 01:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fe97d9e67425522159a2341682c67a31 SHA-1: ce23bc2c4eb016a00c0eb159bba765cf06c253e1 SHA-256: de7fcd6af05cab64df8e018cc24a1958d8e8b641cf5c0a80ebea79505249557d
170 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector and part of a link farm, with one primary URL pointing to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL and text suggesting a lure related to journal author guidelines. The ML classifier strongly flags this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.ru/123?keyword=respiratory+medicine+journal+author+guidelines In PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/xiloxaf_senor_bowifov.pdfIn PDF document text
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/tufifejus_juwugotelakug_jemibil.pdfIn PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/janewu.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/4d2f17ad71fb9.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/7971455.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/jelubono.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jolon_koxuzozudanik_makilitinami.pdfIn PDF document text
    • https://pedegafulip.weebly.com/uploads/1/3/0/9/130969407/3669535.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9447d1a-cbe2-4803-896c-e5b54eecbcb9/kajinewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7431fa12-0b02-412b-8d83-13ef695c5648/lanasexuputiboximipag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee3d793-6b09-4765-90d8-6dc2133e7b58/fovagegax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff0bbd2-4332-4ec6-8d5c-253fcedb5f52/44569090988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0490/4409/5153/files/ole_miss_meal_plan_cost.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3487/7850/files/rukisidapekodal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6627/7534/files/7781669452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4680/4900/files/jetojujedomojinuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2707/1127/files/pugimarukezudur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3218/4485/files/spires_of_agartha_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6701/4819/files/21693465464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1910/7991/files/7_month_milestones_baby.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_off00012fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC7 5672 bytes
SHA-256: 43aa4514d65a17d6447787e2ef2e91a4d12291dd9a1f430358e4aa8141555dc6
font_01_sfnt_off000142f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F1 10980 bytes
SHA-256: bb9f1b227de3ea301fa66b45e7f1bd8ec2cb8ab9bb3e1318346c7f124f451b04

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