Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e243b3e9e422afd…

MALICIOUS

PDF

45.2 KB Created: 2020-10-04 16:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bda4efdd720d4e709b0e352b720a362f SHA-1: 2b92bf7f619077695ec0c7ac272fcf8b56eb3811 SHA-256: 3e243b3e9e422afd6eb1fe59f69feaf11292026b453ac803b5802d388152146d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link pointing to 'cctraff.ru', which is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Adobe pdf editor mod apk', suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links, many pointing to benign Shopify domains, indicates a potential SEO poisoning or link farm tactic to obscure the malicious destination.

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://cctraff.ru/strik?keyword=adobe+pdf+editor+mod+apk In PDF document text
    • http://files.messageinabottlebook.com/uploads/1/3/2/6/132680808/ebf3eec6b.pdfIn PDF document text
    • http://momumoj.badlyscattered.com/uploads/1/3/1/4/131454165/jedofatodoxe_tasevekubegedu_walapol_lariworojegulok.pdfIn PDF document text
    • http://dagik.mj-johnson.com/uploads/1/3/0/7/130775918/moribo.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/1/0483/0376/7715/files/what_are_some_of_the_most_dangerous_plants_in_the_canyma_nislands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3368/8226/files/icnd1_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5190/4924/files/nofezasine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a276f699-abe6-4c84-960d-78b658797a29/5175984483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/378bf521-9424-4760-9eba-8b47381cf2f0/39163532344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33ce65ff-901c-42cf-b0f4-3059e199a553/xivazagidasabexorexipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b1da706-326c-40ff-9548-efe8a29f9b5e/zoruvaxarumejizuwugar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eca6ec5b-efaf-43fd-980d-04b3d350841b/nunejegugavegomuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d83a275-95d5-42b8-9f6c-9027d7a44fce/jujodexuboxidotafaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c95604ab-cb21-4db5-89f2-5554c229a0e6/fofujorukenano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d444f27-bfdc-47a1-83f4-e70dacfc577c/sirovepizodosefatexe.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_off00007610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7610 5172 bytes
SHA-256: 09609848417758a92aa54711bbc1806755212924e70e506d47fea1042e2094de
font_01_sfnt_off0000878a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x878A 9460 bytes
SHA-256: 447bad0edb3cf622cb038adc986c5b0489d2e970c41120e677164b11ac6ab059

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