Malicious PDF — malware analysis report

Static analysis result for SHA-256 037357efeb30459e…

MALICIOUS

PDF

66.1 KB Created: 2020-08-22 03:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 696036fcad4f2084ac9ecd88314c58af SHA-1: e145833a6c68b6a3474896f8d9df4c4c895cddba SHA-256: 037357efeb30459ee4e9401ea478a26d1e7a966a77c61d2674a2d8a86ccd2dbb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many of which point to a link farm designed to host malicious content. One prominent link, 'https://ttraff.com/pify?keyword=arab+health+2019+logo', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same URL, suggesting a phishing or redirection attempt.

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://ttraff.com/pify?keyword=arab+health+2019+logo
    • http://files.stmarysalehurst.com/uploads/1/3/1/6/131606006/d4ae004bbf1ee44.pdf
    • http://ruxiponad.sweetvanillapatisserie.com/uploads/1/3/1/8/131871433/tijuwinexom-xudepivawofi-kezesi.pdf
    • http://files.statewidegeneralrenovations.com/uploads/1/3/2/3/132303312/adc06a746.pdf
    • http://vativuv.oursaviorsdevilslake.org/uploads/1/3/1/3/131383314/3003977.pdf
    • http://files.sweethartbaking.com/uploads/1/3/1/8/131872269/lelevevitegul-sarowinalikasu-safosodi-bapitefazasiki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/3117/4039/files/gefiwug.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0295/files/sardis_lake_levels.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/diderodagadi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0099/5741/files/find_archived_mail_in_gmail_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1085/files/3297830915.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6460/files/bell_s_palsy_facial_massage_exercises_pamphlet_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/3389/2763/files/breast_cancer_etiology.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/14311523810.pdf
    • https://cdn.shopify.com/s/files/1/0437/0684/3288/files/46946811809.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/internal_body_parts_name_with_picture_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/waspy_g-_eazy.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/blank_checklist_template_printable.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7605/files/sesaxidupamawixi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b810.bin
a01330b58ab461e104e84daf7a0b91eeb23e5f72cbddd20c446d170eb0e4fea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB810 5016 bytes
font_01_sfnt_off0000c937.bin
7b3ca28938f36bb909704ec19babfb57fab3c320270e854de27d283c2aa49f11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC937 10492 bytes
font_02_sfnt_off0000ed13.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED13 4324 bytes

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