Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa6f1393c609bf3…

MALICIOUS

PDF

47.3 KB Created: 2020-10-25 03:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d55e9c3eea3a5f30704420d655d464d5 SHA-1: e7e719a9195cb101e84e9237a61367a4b64d81bf SHA-256: 2fa6f1393c609bf38775c55c1c0b96bcc015c90b9515bbdabeef45fd8da24439
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 critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://gettraff.ru/123?keyword=fluvial+depositional+systems+pdf'. This indicates an attempt to direct users to a malicious site, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The presence of numerous external PDF links also suggests a link farm or SEO manipulation tactic.

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=fluvial+depositional+systems+pdf In 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/b45dda67-dd0a-48d6-ba61-e9253ffdb829/34035215725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc4645a5-68d7-432e-a59c-85fd66a14961/96635549419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36e9d7a4-6b28-4e91-8c14-f671ef50167d/92629093777.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/zovone.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/resume_format_for_marketing_executive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7534/6847/files/aiag_fmea_reference_manual_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8363/5619/files/chest_guidelines_anticoagulation_vte_prophylaxis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e773508-8e43-41dc-9e51-8ba286f24d76/pelesesesijotifazima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4becd170-8aab-47e5-9d5d-b3004e3902d2/86996476313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18342ecb-4fb3-46e5-9168-b366753b7736/pee_mak_phra_khanong_full_movie_eng_sub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/923a1b11-0718-42dd-8676-920ce1cb7961/65191925945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c726056-3802-498a-b2a7-443396d5cfd2/nejivitafepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de1eae11-37f7-433a-8261-d6f1ac1a8888/nudizuvararum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9099630e-ec8c-41b8-ac49-a000d75a8313/toshiba_scs_t160_english_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2544/8091/files/fuxotipaneluzanikedoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0719/5311/files/action_games_for_android_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7231/8366/files/3590784211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9055/1981/files/5051582454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/vagadekugoto.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_off00006f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F20 2968 bytes
SHA-256: 771033003054101e9e87eceebec65dd17fac76109d4f476580acb9549e794e17
font_01_sfnt_off000079c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C6 5208 bytes
SHA-256: c46a7c72863601e2b4b07a643da76a0932243108417c4cea0a51e4f42fa5c779
font_02_sfnt_off00008b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B86 10408 bytes
SHA-256: 3d3c870a7c87f90dbd3a6dba244970c98e34e4b6979ee9b67e403770dcdeb383

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