Malicious PDF — malware analysis report

Static analysis result for SHA-256 020176469fe822ca…

MALICIOUS

PDF

40.1 KB Created: 2020-10-29 22:37:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3d5dfeed482230d274ed65d2a8bb0ab5 SHA-1: 5406b0f7931997431e9498722450888b117d5bae SHA-256: 020176469fe822ca8d5eeefa360c8ee7b3dd7c5134e97f77585f32f8b50cc3d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, with a heuristic identifying it as a PDF link farm. One of these links, https://cctraff.ru/aws?keyword=gw2+change+ascended+stats, is flagged as a known malicious redirector. The document body is largely unreadable, but the presence of the malicious redirector and the link farm structure strongly suggest a malicious intent, likely to lure users to malicious sites or to manipulate search engine results.

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/aws?keyword=gw2+change+ascended+stats In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f87572b1da4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f983db5dfc2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f86f5427ebd0.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/1/0437/6467/8807/files/how_the_mind_works_larson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8313/4626/files/lojeteralisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7255/2601/files/rxprep_2020_free_download_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7795/2186/files/96663268270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7487/9642/files/52544834708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9831/6705/files/70711305974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0967a6b-e48f-4629-898f-e09fe396adb0/zubaledikorejodizepil.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/padma_awards_2018_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2694/5947/files/appscan_source_for_analysis_user_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3414/6464/files/sequences_practice_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/phonics_ch_words_worksheets.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_off00005c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C29 5328 bytes
SHA-256: f5228f48f5433fafc929f7b1bef84cf4cfeb237d2e56cd5f68e5d59a0031d5c7
font_01_sfnt_off00006e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5E 10484 bytes
SHA-256: d1091f62829b8a8388c3a654c128cdc8b0aa4fff12cbc91819194b62eb4ea2ba

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