Malicious PDF — malware analysis report

Static analysis result for SHA-256 7190e91caf14efd2…

MALICIOUS

PDF

42.5 KB Created: 2020-08-07 05:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7382f18cc2e5f8380daf02726808e3b SHA-1: c179057bc50328d107ba3a6ecea351d3da72448d SHA-256: 7190e91caf14efd21382e3b5c00485afd791ef8c89dad992541a5143b873050a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged the document as malicious. The presence of numerous links suggests an attempt to drive traffic to malicious sites, potentially for SEO spam or phishing campaigns.

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=angielski+w+t%25C5%2582umaczeniach+gramatyka+4+pdf
    • http://files.catrinamain.com/uploads/1/3/1/3/131379594/veniboze_medogagigosoli.pdf
    • http://files.thstofficial.com/uploads/1/3/0/7/130738700/8388610.pdf
    • http://files.adelaide-pilates.com/uploads/1/3/0/7/130739761/zijupepojumoviziwese.pdf
    • http://files.ncstateroleplay.com/uploads/1/3/0/9/130969204/todejexabukil.pdf
    • http://files.healthandfitnesswtea.com/uploads/1/3/0/7/130740069/delujuraro-dikis-rinixafikox-vominaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/wejepaparapuzuwob.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/bepuxirusevulogex.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/11501780145.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5799/files/catalogo_de_cuentas_de_una_empresa_industrial_ejemplo.pdf
    • https://cdn.shopify.com/s/files/1/0438/0013/3793/files/mp4_to_mkv.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/gawiwojen.pdf
    • https://cdn.shopify.com/s/files/1/0434/6612/9574/files/wonesaxivupasunapidiwat.pdf
    • https://cdn.shopify.com/s/files/1/0432/6952/1568/files/gesenuduzemibevogudisi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6998/7223/files/tevubelevuxavitelezodu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/68694450347.pdf
    • https://cdn.shopify.com/s/files/1/0430/8818/3456/files/sivedupurupipawipurovo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/32694841711.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/xunirutazoliseselarupinu.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_off00006184.bin
45768f738f542f6e9d4d9759876ee14a18cf90f2e2197a51db40020b216169bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6184 6008 bytes
font_01_sfnt_off00007607.bin
09f041d200204487a23ef09d24a9716ec268d2d02e1ceb31d93568863c784b40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7607 11480 bytes

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