Malicious PDF — malware analysis report

Static analysis result for SHA-256 38287ef761e56c80…

MALICIOUS

PDF

49.9 KB Created: 2020-11-01 06:05:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 76c2ae13815d531f12084cc87091ae9c SHA-1: dc472e221ee87cf5feeb9a14323af33d0a602eec SHA-256: 38287ef761e56c802b58db192dc81cfa9eae4fa496c07a202ff436222376266a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ttraff.me/123?keyword=avenged+sevenfold+a+little+piece+of+heaven+lyrics+album In PDF document text
    • https://gatilavim.weebly.com/uploads/1/3/4/3/134391542/mifef_widojifilixunof.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/1/0437/6412/1757/files/gofojopum.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/jujoxalaxufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2411/4076/files/nigafebebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7296/1688/files/souliere_platform_bed_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7281/8845/files/drastic_ds_apk_no_root.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/apgar_familiar_infantil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2652/9435/files/fusionner_2_en_1_gratuitement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0137/5650/files/destiny_2_pvp_rank_reset.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/5485/8908/files/torrey_pines_high_school_tennis_courts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9633/3251/files/what_is_an_indicator_species.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/52919491512.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_off00006f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3D 3120 bytes
SHA-256: 16a0685b1af8f7ff3286410c82d065b2ef9dd16f5cc5e004aadb0dd239daad33
font_01_sfnt_off00007a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A70 5860 bytes
SHA-256: 03c8e9ff67c70b67882b309e1cf9dc2fed5a093f7df9479d9a90c8d073ce7309
font_02_sfnt_off00008e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4E 14112 bytes
SHA-256: 92068b4e4edf3af55cd5ed9eb9e03661baf6d2cdac0c729485323623d82a1641

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