Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d24a107cba5afc3…

MALICIOUS

PDF

46.2 KB Created: 2020-08-19 00:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f2528beb1641f885390a724868fa84af SHA-1: b7575b395822175827243134a80223c5cfdad8e3 SHA-256: 5d24a107cba5afc300095c20bc487f999a566d03b1ec3e34b263c3affb4f6abf
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. It also features a large number of embedded links to other PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs supports a phishing or redirection attack pattern.

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.cc/pify?keyword=hestra+f%25C3%25A4lt+guide+glove+test In PDF document text
    • http://files.scottmedbury.com/uploads/1/3/1/4/131453823/664c25811e4460.pdfIn PDF document text
    • http://files.strongsvillegop.org/uploads/1/3/0/8/130814758/4271846.pdfIn PDF document text
    • http://files.waggabeekeepers.com/uploads/1/3/1/4/131437508/xerinakowaxopumo.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/1/0429/7385/5903/files/fivewezafexofanibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/94315782019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5589/6983/files/coloring_house_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/83105993485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/meaning_of_annual_general_meeting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4565/0586/files/sources_of_administrative_law_in_south_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/zakikaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8453/0343/files/19549336229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/wejuwezotuxovoxiwula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/reading_comprehension_kindergarten_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5601/2191/files/blurry_eyes_emoji.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_off00007253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7253 5332 bytes
SHA-256: 7ddc3fad1e319e720e7b2b93fbac91c42b1a3030f2a8982f070b509349105258
font_01_sfnt_off000083f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F4 11096 bytes
SHA-256: c8b24a74ea373548c1374ec9c8ac66bd0f615051652ad650be511d681b2bb85d

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