Malicious PDF — malware analysis report

Static analysis result for SHA-256 caa32455a55d40eb…

MALICIOUS

PDF

37.4 KB Created: 2020-08-28 14:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2f9cd49f918354e121afa4b3208859f SHA-1: 4b32d0fff678d7a42e138cebf17a47d5831682f0 SHA-256: caa32455a55d40eb6529bb6ad73a2f714d955132a0b5cc7bbd183f48ea44f390
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The PDF contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector and another flagging it as a link farm. The primary malicious URL, 'https://ttraff.cc/pify?keyword=borderlands+pre+sequel+infinite+loop', is likely used to redirect users to further malicious content. The ML classifier strongly supports the malicious verdict.

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=borderlands+pre+sequel+infinite+loop In PDF document text
    • http://salenam.unidadepastoral.com/uploads/1/3/0/7/130776031/benak.pdfIn PDF document text
    • http://files.jamesjordanfoundation.com/uploads/1/3/1/3/131384281/papiko-vogad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8036/7780/files/87916672671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4084/7510/files/ca_foundation_2019_date_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6481/9874/files/solving_simultaneous_equations_worksheet_kuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6009/2309/files/90141662048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2718/4281/files/skills_analysis_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6897/2444/files/lozowabemikalim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/berekujefuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/9415/4904/files/biology_life_substances_notes_macromolecules_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5242/5631/files/91650499891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1223/5159/files/17376899256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/3096/1317/files/87070200502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4386/2181/files/kalasategijuzunuxejijepix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3338/7423/files/patarotamezipur.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000535e.bin
fa38879c37b50bf56dd6273804be018128a02d4cd95a3fd2b831487e9aa6c631		 pdf-font-stream PDF embedded font (sfnt) at offset 0x535E 5212 bytes
font_01_sfnt_off00006524.bin
e4a078a086704784d2fbddfcd21d094be1bf7f2c9ee862244925e92a44a84227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6524 10452 bytes

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