Malicious PDF — malware analysis report

Static analysis result for SHA-256 52198d0ae9b4e16d…

MALICIOUS

PDF

41.6 KB Created: 2020-08-07 21:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e59234eef4d974ecf7325ef8a9759dbd SHA-1: aeabb183b4760d43bdd11642bed33b649bc4d16f SHA-256: 52198d0ae9b4e16d17d42a6496aec8431744c4098b386cf23a0d585afe49fb98
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, disguised as a magazine download. This is further supported by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL that is likely intended to be clicked by the user.

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=attitude+magazine+june+2020+pdf
    • http://files.aphpersonaltraining.co.uk/uploads/1/3/1/3/131398477/91fc5934653c61.pdf
    • http://daluzu.viciwreford-sinnott.com/uploads/1/3/2/8/132814989/1879116.pdf
    • http://files.clinicamenta.com/uploads/1/3/1/8/131871390/9697f82.pdf
    • http://xiwiler.deltakappanu.org/uploads/1/3/1/0/131071157/f0f6010c50c1.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0122/files/drivers_manual_ma.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/28107611645.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/vivekasodaroxelex.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/bepos.pdf
    • https://cdn.shopify.com/s/files/1/0436/1748/4957/files/avionics_certification.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/lojopotiporoxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4833/files/55353054814.pdf
    • https://cdn.shopify.com/s/files/1/0432/4143/9400/files/lopedulesijezijizedupafis.pdf
    • https://cdn.shopify.com/s/files/1/0434/5944/4889/files/v_wason_accountancy_class_12_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/reverse_words_in_a_string.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8133/files/walofaxugewek.pdf
    • https://cdn.shopify.com/s/files/1/0436/3006/7865/files/dekogoru.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8360/files/postgresql_add_column.pdf
    • https://cdn.shopify.com/s/files/1/0437/7051/1521/files/30th_amendment_in_constitution_of_pakistan.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006524.bin
1bcc579b811728155f72321ad6bc039c8f4adc9118534e001be3927bbc6f9b92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6524 5444 bytes
font_01_sfnt_off000077af.bin
5d32fad86ebc4bfbd2daecccedead8cefa1c52dae9043ff903482ab823f9e214		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77AF 9960 bytes

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