Malicious PDF — malware analysis report

Static analysis result for SHA-256 743f0804debf8966…

MALICIOUS

PDF

60.8 KB Created: 2020-10-14 21:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3bab37d87046d20ec40ab06cd9a5e7d0 SHA-1: 598127f2ba19757f7fbcef3d3888fa88919eef78 SHA-256: 743f0804debf8966d7ddedfdd043edc4e2226adcf024e9352f67a93f7ecb9401
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains a URL that mirrors the search query, reinforcing the lure.

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://ggtraff.ru/pify?keyword=life+fitness+f3+treadmill+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f86f82da5238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f871791df8cd.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/topexukiguf-nulakekez.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/b4b3eb38b.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/venunigimok.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/fubisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f873fb0c22ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f873320d6a6f.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/1/0488/3500/2533/files/runescape_the_brink_of_extinction_quick_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9137/1196/files/xanirumilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8846/5054/files/nabilodojoxolovav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8087/3637/files/kidnapping_sentencing_guidelines_in_california.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/zovovajaludatadebebutadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7968f39-8d36-49e8-876d-51e5fecf90cb/libomopojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b5d594-7d19-4435-afcd-37d4e23a403f/bosobar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/420ef515-f1d3-429f-b715-0f7d85023c6f/76571417556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f61d935b-a53b-418f-b64b-63675d8f61a6/76591664741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7683fa5-a1a6-4f79-916a-a814ab4cc581/gewapugus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9853/2757/files/dragon_genetics_worksheet_1_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9507/2672/files/simms_injector_pump_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1963/9190/files/analysis_for_financial_management_11th.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/1511/7466/files/coloring_book_for_4_year_old.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C07 10852 bytes
SHA-256: babc8ca3302dee470a3397e7e540121d8a3e0a104986c66eaf98b17f034fdf94
font_01_sfnt_off0000af7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF7D 5292 bytes
SHA-256: 4fc1cb0814b107e6e4b3983fd5687fe934ff6669b2bd3d25770912d136874601
font_02_sfnt_off0000c162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC162 10616 bytes
SHA-256: d0b7371563b436dc9bf62e62e566558f3df22e3bf1b5b7a78ec4b81c7f55ec18

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