Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b44e573cd8165df…

MALICIOUS

PDF

48.1 KB Created: 2020-10-28 14:33:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d9cbe1756eb62263d45d4b6696115b93 SHA-1: 804feeffbb07c51182d57bda2a4aafb86b8b2e48 SHA-256: 9b44e573cd8165df7ac4f8568658b46ec8a7e596f6e5d260f56a2fa8caa920c5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link to a known malicious redirector, ggraff.ru, which is likely used to host or redirect to further malicious content. The document body, though heavily obfuscated, contains keywords related to 'Harbor freight garage shelving' and the malicious URL, suggesting a phishing or scam lure. The ML classifier also strongly indicated maliciousness.

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://ggtraff.ru/aws?keyword=harbor+freight+garage+shelving In PDF document text
    • https://demifoji.weebly.com/uploads/1/3/4/3/134317184/4717803.pdfIn PDF document text
    • https://basuxebuj.weebly.com/uploads/1/3/1/3/131379820/jujiw.pdfIn PDF document text
    • https://mujunoba.weebly.com/uploads/1/3/2/6/132682006/zedusekigovu_jirul_pozovegow_vipavubosu.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/1/0501/6240/1435/files/39737939785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3533/6090/files/gelopazulibewogaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f18e1e-90ed-4734-878e-df4c05e8808a/konobivuzupowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab991f27-94b9-4ce6-8909-5fa3dda2e256/pitosim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6206/5828/files/mystic_messenger_mod_apk_1.14.6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fef384aa-2b1b-4f5d-b4ea-fa5ed0edd592/34744906245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5574/1589/files/ensayo_sobre_derechos_humanos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20cb0e8b-d111-4320-977d-249caef953f0/mazula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8430/6333/files/53317449405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3325/9943/files/legal_assistant_resume_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5390/7605/files/ethical_fashion_guide_oxfam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c449d5ed-90e6-4b07-88af-398a797cec6e/95426453986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3357/5075/files/18429856278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e47920-52ad-492d-a6ae-120f1fa50a04/94040843964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ef90d98-8c34-402e-b81e-84b7d44ee71f/22096459065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8092/4840/files/polymers_chemistry_project_class_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2439/8528/files/google_forms_survey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5281/2456/files/zufapiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3958/6966/files/fogoxokupevamixupiler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7766/2875/files/41192926565.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_off00007d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5D 5188 bytes
SHA-256: 8e10b4d988f6a928e776fa3287dbf7b1b995c74ac1f913ec2abb7af97f0985b3
font_01_sfnt_off00008f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F09 10348 bytes
SHA-256: 805daaea0be57bfa764b4e1cca8e2f5f79559711f82d7a2d5b365cdf5c5cd642

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