Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b8ed09c598bf22…

MALICIOUS

PDF

44.5 KB Created: 2020-10-28 12:45:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34ee219c807ea47b8ce52c094379bfb7 SHA-1: 495d330a4f528efc3d9cec7585c03f3e849d912d SHA-256: e9b8ed09c598bf221c041db0062d25806767a99e907c5633ded2db71c834505e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, `https://gettraff.ru/strik?keyword=family+therapy+history+theory+and+practice+pdf`, which is a strong indicator of malicious intent. Additionally, the document hosts a large farm of PDF links, many of which point to benign Shopify URLs, suggesting a potential SEO manipulation or link-farming scheme to disguise the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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/strik?keyword=family+therapy+history+theory+and+practice+pdf
    • https://wivepeweg.weebly.com/uploads/1/3/1/4/131455463/bonotarosoxirafo.pdf
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/sazuzajonujoja.pdf
    • https://nikoxutaju.weebly.com/uploads/1/3/1/3/131378952/2382265.pdf
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/fijijiweteredi.pdf
    • https://guzuzixud.weebly.com/uploads/1/3/4/3/134357052/jasinedoririwef.pdf
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/0efcee8cc6dc2.pdf
    • https://pukewuvidepuf.weebly.com/uploads/1/3/4/3/134321324/1096911.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0498/6087/0306/files/natural_selection_worksheet_doc.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7201/files/drawing_buildings_step_by_step.pdf
    • https://cdn.shopify.com/s/files/1/0434/3064/1829/files/siwinefufusipuxi.pdf
    • https://uploads.strikinglycdn.com/files/878c4659-de2f-4d8a-9c16-7152ae30f3df/bmat_2013_section_2_answers_explaine.pdf
    • https://cdn.shopify.com/s/files/1/0437/4780/3287/files/tazemimosudegevisunutatoj.pdf
    • https://cdn.shopify.com/s/files/1/0504/2064/6048/files/microsoft_word_android_apk_old_version.pdf
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/botumivinujipaluleku.pdf
    • https://cdn.shopify.com/s/files/1/0495/4587/1512/files/74142285014.pdf
    • https://cdn.shopify.com/s/files/1/0484/0557/7896/files/bemin.pdf
    • https://uploads.strikinglycdn.com/files/50fce53d-c354-4e22-ad15-f388dc04884e/42948758822.pdf
    • https://uploads.strikinglycdn.com/files/96e5f410-b60f-4a47-b74f-0631dcd0335d/6449391787.pdf
    • https://cdn.shopify.com/s/files/1/0432/3331/2925/files/koridunilipuzemi.pdf
    • https://uploads.strikinglycdn.com/files/878a6772-ec1f-4a79-b1d2-db93597f901e/warrior_guide_classic.pdf
    • https://cdn.shopify.com/s/files/1/0496/2700/5124/files/pure_substances_vs_mixtures_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/susikubaganujusibidaden.pdf
    • https://cdn.shopify.com/s/files/1/0483/3679/7859/files/rio_beach_umbrella_review.pdf
    • https://cdn.shopify.com/s/files/1/0496/0921/2068/files/most_advanced_android_calculator.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fee.bin
38f8966c8517532519a989fac46980e0ac70e2476d870f162457e92db8bff4e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEE 5452 bytes
font_01_sfnt_off00008259.bin
851bf672d1dc482578f784849eec7be4633628b23534f470948954e65e2202a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8259 9984 bytes

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