Malicious PDF — malware analysis report

Static analysis result for SHA-256 445bfc892ca1aabe…

MALICIOUS

PDF

43.9 KB Created: 2020-10-30 23:04:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f5d02896e93daa777690058a5004f29b SHA-1: d74d23bd505195bd8b238b2eacfa4d36f8a68374 SHA-256: 445bfc892ca1aabe71734a2988393622dc36260981e35c921bfdae57c5b264c8
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'love language survey quiz' and includes the malicious URL. The presence of a link farm heuristic further indicates an attempt to distribute malicious content.

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/123?keyword=love+language+survey+quiz In 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/1/0497/3389/4293/files/catch_your_boyfriend_cheating_app_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4828/3543/files/kenareta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0218/0006/files/zozovakamavef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6533/5208/files/minna_no_nihongo_basic_kanji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2231/7728/files/wesokutevonemamovoburu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8425/7724/files/tipos_de_ictiosis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8661/7007/files/68483914225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9117/4584/files/52075567438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d544ac53-06e2-4552-b8f4-1e209ab76afa/4826289507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1432/9772/files/ritibixizozebixomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a7bd1c3-04b1-4503-8745-4d765e023fc2/63215386729.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/xubebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6644/8808/files/lakshmi_narasimha_ashtothram_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5535/7382/files/lexarimitixuxejakasur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1263/4816/files/kulakefagutitawujaj.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_off00006dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEC 5132 bytes
SHA-256: b30e99ea74f4bca2f5e9e9f147710cb109d6ca9ff91d861a27dbd5dfc47e9eb6
font_01_sfnt_off00007f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F87 10416 bytes
SHA-256: 6490da9f34b71eb7ef0768a0ad71db02e32c37c5730372d02da43f6276ba0eaa

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