Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa4d35d6ea4d3be7…

MALICIOUS

PDF

55.5 KB Created: 2020-10-07 23:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bae8b6408d8a4e32d7e8544315c392f2 SHA-1: 48bc9873e6f2b0e88a22e71811f3add3117679db SHA-256: aa4d35d6ea4d3be7dbbe03c7a94668b23bd507d0b7b18a0ee9d6fd01e9fe7a4b
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/pify?keyword=soul+mate+quotes+for+him In PDF document text
    • https://site-1036932.mozfiles.com/files/1036932/sifidefolotab.pdfIn PDF document text
    • https://site-1043537.mozfiles.com/files/1043537/81652362343.pdfIn PDF document text
    • https://site-1042942.mozfiles.com/files/1042942/19808881048.pdfIn PDF document text
    • https://site-1036744.mozfiles.com/files/1036744/29918528510.pdfIn PDF document text
    • http://dusufe.artchemtech.com/uploads/1/3/0/7/130776247/tenemukazugeluz.pdfIn PDF document text
    • http://gopedi.fremontbands.com/uploads/1/3/2/3/132303382/1781899.pdfIn PDF document text
    • http://files.lansdownepto.org/uploads/1/3/1/3/131398360/xixumagano-pitegol.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/1/0499/6779/2296/files/yuki_japanese_restaurant_mcdonough_ga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7902/7867/files/katawa_shoujo_lilly_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2468/1640/files/saxilokotiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4329/9234/files/jatalefatuxenonopide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5485/3027/files/31085228624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3422/6069/files/40359875971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0508/2776/files/16704348406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1373/7128/files/5th_grade_social_studies_chapter_8_study_guide_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3603/6256/files/452442336.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_off00009d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D54 5236 bytes
SHA-256: 00fe2ec7f9fd0030457b0adbac87bac583c2d40f03ccbba9b1a50e037adfa432
font_01_sfnt_off0000aef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF3 9964 bytes
SHA-256: 94c769435af3299c7d14747aa85f5fb4d29ba9c5af18fd9940e6a4d1e7caea59

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