Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d0095db8bca2f7…

MALICIOUS

PDF

46.1 KB Created: 2020-10-01 07:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: a6faad4806d657b967f76ce2aca3e46c SHA-1: 57cc6dbc5009fe80d73ec9fe2453046f4de6f379 SHA-256: 55d0095db8bca2f73e4e52c117a15f66fd64e104be9170008db0f0f385856f12
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/strik?keyword=score+d%2527+apgar+tableau+pdf In PDF document text
    • http://pojipef.forensic-audit.org/uploads/1/3/1/8/131871980/rulanesirux.pdfIn PDF document text
    • http://files.therocksm.org/uploads/1/3/1/0/131070572/533100.pdfIn PDF document text
    • http://files.simplyjewelrybydebbie.com/uploads/1/3/0/8/130874067/zelerikojategorumaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3009/2712/files/putnam_bowling_alone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6995/5486/files/50985509050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2949/4950/files/sharp_aquos_32_inch_led_tv_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/avatar_kyoshi_novel_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3823/6826/files/composite_functions_word_problems_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf8a400-d336-4db1-8f73-fee4d22ed9aa/59736619957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9443bd6a-e389-4457-a75e-2c3f5d70cda4/69238995939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2541/1481/files/29164716243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5846/5430/files/jifipanepob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5081/0014/files/86566437320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/2s_complement_calculator.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68AF 5148 bytes
SHA-256: 646e7e939eef4da86f0c9396d3f66be87e4b8f69335b659cfdea0e840104b1c8
font_01_sfnt_off00007a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A41 10404 bytes
SHA-256: 75b60ba8521f540f66bb632f5b7d57c864633e17ca81c2281cc020929e173bba
font_02_sfnt_off00009dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DCB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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