Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd401912d6104544…

MALICIOUS

PDF

106.8 KB Created: 2020-10-06 09:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 5d4c771995e3c3ad9d959e47a7f50e24 SHA-1: 91e48d5bdbad1d098a09733ed971e2f08e6d15de SHA-256: fd401912d6104544df4f98a974b144088737de753810dec677b67a333c6dc59d
162 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to downloading a PDF, and the presence of urgency language further supports a phishing or scam attempt. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=india+before+europe+pdf+free+download In PDF document text
    • https://site-1036756.mozfiles.com/files/1036756/65478291099.pdfIn PDF document text
    • https://site-1037111.mozfiles.com/files/1037111/39625881584.pdfIn PDF document text
    • https://site-1038552.mozfiles.com/files/1038552/gisasoruwawusib.pdfIn PDF document text
    • https://site-1039506.mozfiles.com/files/1039506/rovunikif.pdfIn PDF document text
    • https://site-1039150.mozfiles.com/files/1039150/binazipul.pdfIn PDF document text
    • https://site-1042497.mozfiles.com/files/1042497/gepunozafuduteburu.pdfIn PDF document text
    • https://site-1039135.mozfiles.com/files/1039135/ropuwekamezitinavodemi.pdfIn PDF document text
    • https://site-1039807.mozfiles.com/files/1039807/40353212158.pdfIn PDF document text
    • https://site-1039617.mozfiles.com/files/1039617/fomokaxafaxevonavatajon.pdfIn PDF document text
    • https://site-1036692.mozfiles.com/files/1036692/26499076470.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/1/0484/0118/6973/files/pewelixexefimakoritafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0524/6112/files/39959865272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1482/2811/files/types_of_silk_fabric_in_pakistan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9162/6657/files/berry_full_of_dna_pre_lab_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6605/1746/files/fidixexifetelaguruxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/1434/8712/files/usps_return_envelope_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1608/9510/files/jamigofofemijolala.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_off0001627a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1627A 5028 bytes
SHA-256: 526caf2a8d7138649512b883ca959725c584a231721e225aa89061fb46aa1252
font_01_sfnt_off000173b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173B0 12280 bytes
SHA-256: 75d596c43a0d14672ee23410fd8b0cbe163feca2ffdc2546d37835e2d18e9fd7

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