Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba533f1d603ba3d…

MALICIOUS

PDF

41.2 KB Created: 2020-11-02 05:32:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d96d087bafb603df667caeaffc13d3a2 SHA-1: d70d5df1ae125429bc7e8c0fce36a4fd968ac85b SHA-256: 2ba533f1d603ba3dc6000e6d8c2b533b1ebb74b4db03d7e5bdcc6b6344d645cf
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large collection of external links, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The presence of the malicious redirector URL points towards a phishing or malware distribution attempt.

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://ttraff.cc/123?keyword=senge+graphics+coupon In PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/2418933.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/8ed9d67addc.pdfIn PDF document text
    • https://pekedilude.weebly.com/uploads/1/3/4/3/134324883/d2eaa4b.pdfIn PDF document text
    • https://taruzabob.weebly.com/uploads/1/3/4/4/134493447/4091884.pdfIn PDF document text
    • https://duxevuwelinabim.weebly.com/uploads/1/3/4/3/134353564/a77df.pdfIn PDF document text
    • https://fefaxositepimu.weebly.com/uploads/1/3/3/9/133986539/liwikevedavoporisep.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/fc1c1d8c-2304-48b7-aa9d-61c38e51bcee/2020_irs_form_1040_payment_voucher.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1229/1264/files/my_boy_emulator_apkpure_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5473/3729/files/monsters_inc_mr_waternoose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d275099-3e13-4297-af89-5c5ec462168f/tulasuruwubije.pdfIn PDF document text
    • https://s3.amazonaws.com/takeju/apollo_125cc_dirt_bike_rear_wheel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6567/1325/files/13706671635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2353/2710/files/8990873468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5173d11f-581b-4ca6-b0d2-89538213cd16/18823060125.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_off0000606c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606C 5264 bytes
SHA-256: a910d93fc1c1a06b481aa771ec0f6025a4ab29610a072b42dfadaf9860e3a66d
font_01_sfnt_off0000724d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x724D 10984 bytes
SHA-256: 1dd2a421fc352fbd50186c3fc972343b23ca847710aa874fbf81fcba68d7fadb

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