Malicious PDF — malware analysis report

Static analysis result for SHA-256 da3773722b7f524f…

MALICIOUS

PDF

35.0 KB Created: 2020-10-18 00:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ece7a2f759f4b8eb6dbc37b564ba3034 SHA-1: 6782d8370eed590b23746097a3f1a592a3741cf1 SHA-256: da3773722b7f524f9a53bcd0e46ee0324b609067ac98880ffbdd8f8eca7a61f9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to suspicious domains and are indicative of a link farm designed to redirect users to malicious content. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that aligns with the observed link farm behavior.

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/123?keyword=zagg+rugged+messenger+ipad+2020+manual In PDF document text
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/4008283.pdfIn PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/gudag.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/bewikidawiwejid-jivojivadije-bawomutebidoga-jidoxakiza.pdfIn PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/rowasopusipowatotub.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/runivokokovagis_tusabu_rimetol.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/1/0496/0757/3653/files/ffiec_bsa_aml_examination_manual_risk_assessment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8281/8733/files/mefalilawox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0623/2229/files/4.3_arithmetic_and_geometric_sequence_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a41a4f47-388f-4071-8f0c-b47610d55ee0/dajinitomumagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c46ffb23-fa85-4053-81eb-b2f86abf81c3/bizugitojuxexadifak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e3a322a-c9f0-4bec-bf3c-c4d69ab7eed0/35830149222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe4ba314-7af2-4b71-9adf-23f137407246/2923478541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be04750c-f377-4dde-89b1-7fb157246205/mofazekisixap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da4bd078-fcd8-4bce-bfd3-45c4b9eb5957/gugegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/109376f2-fbfa-45e4-9b77-b5f509d1cf94/10588190278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ece2a8e-1d24-4470-bda6-c9372f1789bc/gaditirox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53a20cd7-9620-486f-bbd0-9f6579daa558/pigilinabiguz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/3883418899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0672/3749/files/28594858960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1411/7293/files/coffee_grinder_manual_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7373/0213/files/burrito_bison_mod_apk_2.85.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_off00004c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C7E 5512 bytes
SHA-256: 36d7f1faa225208edeff8b2349a8f39792abd33425744db18712e949fe4d7d44
font_01_sfnt_off00005f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F23 9444 bytes
SHA-256: 70fe28fe6264428c3b43cdd1d29fe3ba843cd7f53205b86b3b5c72c9e890bad6

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