Malicious PDF — malware analysis report

Static analysis result for SHA-256 dadcb87820759612…

MALICIOUS

PDF

43.4 KB Created: 2020-08-10 12:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a9895eee53e07ba06af4138aca5155f SHA-1: 36902590d43fdba26676abbb055c03783c24dcb4 SHA-256: dadcb878207596127514a1a4856e25bd2ca30208eabf67ba7a74c293f53acc1d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a translation service. This indicates a phishing or malware delivery attempt. The document body, though partially corrupted, includes the same URL and mentions translation, reinforcing the lure. The presence of numerous external links, many pointing to Shopify domains hosting PDF files, suggests a link farm or SEO poisoning technique to improve search engine visibility for malicious content. No scripts were extracted, but the primary attack vector is the malicious URL.

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=translate+chinese+to+english+pdf
    • http://files.notary4public.com/uploads/1/3/0/7/130775279/e55fe421cb09.pdf
    • http://fakufumof.psr.camp/uploads/1/3/0/8/130874197/f066c.pdf
    • http://files.elefantsnowboarding.com/uploads/1/3/1/4/131407178/poramugogo.pdf
    • http://files.adelaide-brushfencing.com.au/uploads/1/3/2/7/132712266/8137849.pdf
    • http://files.fremonthog2232.com/uploads/1/3/1/4/131453156/3048822.pdf
    • http://www.fotolia.com''gt;Fotolia
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/man_the_unknown_by_alexis_carrel.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/65843800052.pdf
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/tibafajekot.pdf
    • https://cdn.shopify.com/s/files/1/0436/5520/0918/files/bible_study_on_prayer.pdf
    • https://cdn.shopify.com/s/files/1/0434/8946/0376/files/punjab_benevolent_fund_form_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7000/5156/files/dreamed_a_dream_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/7818/8198/files/gokolobawodiwabaxokikosiv.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6861/files/administracion_de_recursos_humanos_gary_dessler_pearson.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6852/files/pased.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/rapegajaworobofozipim.pdf
    • https://cdn.shopify.com/s/files/1/0430/4368/4503/files/causal_research_design_definition.pdf
    • https://cdn.shopify.com/s/files/1/0440/3966/7877/files/lifadamudejiji.pdf
    • http://www.fotolia.com
    • 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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bab.bin
9c3819c2191cdac62174bffd0825561cf1ba03dd49fee49efeef2b995c738f1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAB 5368 bytes
font_01_sfnt_off00007de0.bin
5b2bcc7b4c52bd065f40c0cfb4770635501dce095dd42e42b874ec2399e2e11c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE0 10280 bytes

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