Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cea8f147fc0d471…

MALICIOUS

PDF

46.3 KB Created: 2020-08-12 21:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5022a40789cc21406517e270fc40ec1 SHA-1: fca379abae50a2b50083d59045f3c4096077f4f3 SHA-256: 5cea8f147fc0d471acdc1b8b1f6daf9ee08159ba8ea165f554f50795bf096db4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users into downloading further malicious content. The document body and embedded links suggest a tactic of creating a link farm to improve search engine ranking for specific keywords, likely to attract unsuspecting users. The ML classifier also strongly indicated maliciousness.

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=indexing+and+abstracting+pdf+download
    • http://powimepo.hermanngardentours.com/uploads/1/3/0/7/130775612/vazasidanolena.pdf
    • http://rewemewi.pilotsatpenn.com/uploads/1/3/2/6/132682646/rewulagilex_zasaxifevusafaf_vogofesolotuxex_dimosumozor.pdf
    • http://zexolenob.ggemergencyshutters.co.uk/uploads/1/3/1/3/131379992/jibisuzutisim_vevobaz_nekerafiw_runevajovotu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5281/6798/files/58263024867.pdf
    • https://cdn.shopify.com/s/files/1/0437/0608/9640/files/mokejam.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/how_do_you_install_minecraft_forge.pdf
    • https://cdn.shopify.com/s/files/1/0434/7455/0949/files/41754631569.pdf
    • https://cdn.shopify.com/s/files/1/0434/1723/9704/files/prime_primer_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0430/2287/6826/files/95605351697.pdf
    • https://cdn.shopify.com/s/files/1/0437/0602/4101/files/bash_command_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/7099/4085/files/52511508652.pdf
    • https://cdn.shopify.com/s/files/1/0433/5963/3559/files/19999272449.pdf
    • https://cdn.shopify.com/s/files/1/0435/3445/0840/files/wagaya_no_oinari-_sama.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/bozaxotot.pdf
    • https://cdn.shopify.com/s/files/1/0433/3014/2363/files/fejugonalok.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_off00006fda.bin
e52a7cdbdb3d70ec6797b691270f65b61208e4e3dfb04ab42b3824a14c40bdf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDA 5560 bytes
font_01_sfnt_off000082e4.bin
0c6b7ba4901c870116752ba814279ef7c4f5fc9e6e4b398cdd86a1de581f5b84
pdf-font-stream PDF embedded font (sfnt) at offset 0x82E4 12324 bytes