Malicious PDF — malware analysis report

Static analysis result for SHA-256 60036991d1616e90…

MALICIOUS

PDF

41.8 KB Created: 2020-08-21 12:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00f8e4004c13e37ae1da571f4e50f6e2 SHA-1: e5cd63267e748449bae2f07bed53808aa28196ea SHA-256: 60036991d1616e9093af620027bd432fdc878167388fa34441d86e2405b16b47
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'PubMed indexed journals'. The presence of embedded URLs and the heuristic firings strongly indicate malicious intent, likely to redirect users to harmful content or further stages of an attack. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.cc/pify?keyword=pubmed+indexed+journals+list+pdf
    • http://xasivisoz.batesfamilyfarmllc.com/uploads/1/3/1/4/131437792/tirazepotokepa_zamamubiziviwap.pdf
    • http://lerovil.sfkart.com/uploads/1/3/1/4/131437778/xuzir.pdf
    • http://files.chaxomusic.com/uploads/1/3/1/0/131069819/2704723.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/functional_analysis_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/74529186373.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/noren.pdf
    • https://cdn.shopify.com/s/files/1/0434/1940/2405/files/pisib.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/matusugitukotogadubu.pdf
    • https://cdn.shopify.com/s/files/1/0445/2987/7151/files/shadowrun_6th_world_almanac.pdf
    • https://cdn.shopify.com/s/files/1/0437/4023/3880/files/94412831159.pdf
    • https://cdn.shopify.com/s/files/1/0430/5564/4823/files/norotolitaja.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/59241882552.pdf
    • https://cdn.shopify.com/s/files/1/0436/8501/9801/files/bleach_fade_to_black_english_sub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/vetibasifumoxanawod.pdf
    • https://cdn.shopify.com/s/files/1/0428/3249/4751/files/wuwazevubujawe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6091/2537/files/22209574325.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_off000064a7.bin
c9e2b7d1bcfbbaeeb8d2932719f49593da29a1ffd6c73eb928afcfa686ff93ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A7 5472 bytes
font_01_sfnt_off00007722.bin
c8ea6bcbdd0f42da705bbfe5ab1a1e1a08c0ff373402b6911c706441221784dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7722 10304 bytes

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