Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b94142c8cb4ee1…

MALICIOUS

PDF

41.6 KB Created: 2020-08-12 20:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e70def08030f87c1ace317e1723083e SHA-1: 07ae295179e58cf43804bc307368eb14dded6603 SHA-256: 12b94142c8cb4ee1efc0ededdf116fc2ae87f50b700560ffd4be8c176561973b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure, suggesting an attempt to lead users to harmful content. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, likely for SEO manipulation or to host further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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.com/pify?keyword=voice+operated+induction+motor+speed+control+through+rf+communication+pdf
    • http://files.santorifoundation.org/uploads/1/3/1/4/131438641/bfa85cfd639818.pdf
    • http://sutob.suppliedfromchina.com/uploads/1/3/2/8/132814930/xalitofiletipazus.pdf
    • http://vurelif.culturalcouncil.org/uploads/1/3/1/4/131407005/fowelit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3587/5745/files/bahia_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0437/3908/7002/files/xasepotakewaporazumupiwiw.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/aphorisms_on_love_and_hate.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/14476876251.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3671/files/jupyter_notebook_latex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/megoxidojixugapilanaseg.pdf
    • https://cdn.shopify.com/s/files/1/0432/7751/6955/files/mabedatobatofebuzekemu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6567/1833/files/67309551937.pdf
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/dogenuzanevejurinaliled.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2033782386.pdf
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/pl_sql_interview_questions_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/2529/9606/files/40265886467.pdf
    • https://cdn.shopify.com/s/files/1/0429/6130/5756/files/off_to_the_races_lyrics.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000630d.bin
77c9ea770a07a1f0a02d0f163a89825155e49e9a5d71c35965934889634af78c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x630D 5532 bytes
font_01_sfnt_off000075a8.bin
b702bf4f933a8b49b32ea583943a5927840ad6df6f9a8710dc1b4bec33707fdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A8 10284 bytes

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