Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aaefc517733be29…

MALICIOUS

PDF

48.7 KB Created: 2020-08-25 00:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f5b4e419b1e478752e057ff7912425d SHA-1: f46bb906983f563547a960ba819a858c1cc7c528 SHA-256: 2aaefc517733be292ab191b092f17b94bda63e7f9f97f2a95d48eb8d1f7709ec
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=atharv+and+vividha+pics+free'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on domains like cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The document body contains the same suspicious URL, reinforcing the lure to a potentially malicious site.

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.ru/pify?keyword=atharv+and+vividha+pics+free
    • http://files.laurennotborin.com/uploads/1/3/0/8/130813095/powipukojumev.pdf
    • http://files.vermontcustomfitness.com/uploads/1/3/1/6/131636995/lofinineru.pdf
    • http://mojarulo.bluejacketjamboree.org/uploads/1/3/1/4/131406062/duwodu.pdf
    • http://ligone.yogakathryn.com/uploads/1/3/0/8/130814328/suparavibifulu_dasol.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6349/files/kizufojuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3411/files/phonics_worksheet_phase_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/0783/5292/files/63859099383.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2150/files/tomalipupakedagemulomife.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/90046176024.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/zulutekigulafubogazi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/xebaminipafupaki.pdf
    • https://cdn.shopify.com/s/files/1/0432/3452/5347/files/risk_assessment_template_for_office_workers.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/quadratic_equations_explained.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3333/files/87463687272.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074c1.bin
e7192b7bb5c085ff5b74220a32ab962bfc0498cc75bb75dc95199c65c1660640		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C1 4940 bytes
font_01_sfnt_off00008580.bin
1c513d9743e533937de47ae362df5ce5defab9973793a2ce5842490dd6358548		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8580 10032 bytes
font_02_sfnt_off0000a7f7.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7F7 4324 bytes

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