Malicious PDF — malware analysis report

Static analysis result for SHA-256 38bd7c141dd266ca…

MALICIOUS

PDF

43.7 KB Created: 2020-10-27 17:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 18a0dda724405dcefca731337d1ecead SHA-1: 9dae7fc0ee71b9176da6d62ae160132abe12fa63 SHA-256: 38bd7c141dd266cab51b866cb349a2a621eb2e92057fd36a4a4c9abfafed6577
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to streaming popular media, likely to attract users to malicious sites. The presence of a link farm heuristic further supports the attack pattern of SEO poisoning or phishing.

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=spider+man+homecoming+streaming+disney+plus In PDF document text
    • https://visuzajekug.weebly.com/uploads/1/3/4/3/134305902/9d507ffc75f0a.pdfIn PDF document text
    • https://vajibudutoneraz.weebly.com/uploads/1/3/4/3/134345344/9362201.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/xefafimofaxeparekuji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gitipelut/cal_state_la_map.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/gleichungssysteme_additionsverfahren_aufgaben.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/86485135200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4511/7342/files/89906986358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7224/5926/files/gumuboxuviw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6879/1228/files/whipple_procedure_diet.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/cardiac_arrest_causes.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/padma_vibhushan_award_winners_list.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/zunalodapirokazaz.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/mystery_of_speaking_in_tongues.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/aldous_huxley_italiano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6651/1526/files/bonaire_dive_sites.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/3779/4719/files/63305208881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9366/2133/files/vadoramonozifirolodis.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/vomegelu.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/ansi_c_solutions.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_off00006a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A86 5692 bytes
SHA-256: 63d67eb3b6f1ff8669730965d3c5745daad782f539ef7e48329dcf02f52bb021
font_01_sfnt_off00007daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAF 10396 bytes
SHA-256: 0e36be0eb94b9d8dfbae6e4b86db01d244f0367dd4977a5f5a45039804248926

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