Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d5d7a5ba33e2db…

MALICIOUS

PDF

40.1 KB Created: 2020-08-31 03:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a72595e5709e99413f4efbf4b7c3cdc2 SHA-1: aeee7ec79c46749f65aeb5428b8b7f28e7c8c5a5 SHA-256: 69d5d7a5ba33e2db0959e7128e39cb528346111da09d0f59e9b37708b8fbc6e2
154 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector, ttraff.ru, which is likely used to host or distribute further malicious content. The document body and embedded links suggest a lure to download a worksheet, but the primary malicious intent appears to be directing users to the malicious URL. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely involving redirection or exploitation.

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.ru/wix?keyword=oyunbozan+ralph+2
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6460/7398/files/prime_factors_worksheet_grade_7.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/72321450668.pdf
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/81339945378.pdf
    • https://cdn.shopify.com/s/files/1/0435/7783/5681/files/trumpet_ensemble_music.pdf
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/le_surrealisme_au_service_de_la_revolution.pdf
    • https://cdn.shopify.com/s/files/1/0438/3657/1805/files/mebadix.pdf
    • https://cdn.shopify.com/s/files/1/0439/0980/8280/files/del_fusible_mazda_3_2008_interior_lo.pdf
    • https://cdn.shopify.com/s/files/1/0452/4435/0626/files/amex_priority_pass_enrollment_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/4406/0839/files/up_anganwadi_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/8503/6708/files/zivemeruturezimogarazapa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9947/2550/files/fidalajonobodifiwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3272/4124/files/broward_county_school_calendar_2020_to_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/9702/1854/files/7_sacraments_and_their_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0432/7214/3001/files/24858950656.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/retigarapapigowodusu.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_off00005ea5.bin
6f4fc7d8ae0d9f9486760ab129557444bc7d9f0b3be3b9f12e2012f345a58bbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA5 5180 bytes
font_01_sfnt_off00007040.bin
db438eda2bb684991f46ab2b95f1e91dc52da6fb8cdef79bd614b471cccac23e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7040 10680 bytes

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