Malicious PDF — malware analysis report

Static analysis result for SHA-256 012e378553516aa2…

MALICIOUS

PDF

50.9 KB Created: 2020-08-03 19:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd999d505d484f31a4c10ad8e2dbf68c SHA-1: af6aae36e81ad8e87fcd581c0e1a6fba2c026f4e SHA-256: 012e378553516aa266646cab6fd1627651f7f478df5ff436b72809ca5b6cc04a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF document contains a critical heuristic firing for a malicious redirector link, pointing to a URL that promises a crack for software. This indicates a likely phishing or malware distribution attempt. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign Shopify links but others are hosted on suspicious domains. No scripts were extracted, but the presence of the malicious redirector is sufficient to classify this as a malicious PDF.

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=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+crack+abbyy+pdf+transformer+3.+0
    • http://files.verdancecreations.com/uploads/1/3/1/6/131607522/tewovudinubelepugi.pdf
    • http://files.luisacostagomes.org/uploads/1/3/0/7/130775694/gemalemik.pdf
    • http://files.thethembaproject.org/uploads/1/3/1/6/131636954/pavofopuwiwifan_gejamiziwat_sosikibe_sudapuvixok.pdf
    • http://files.nwlsd-orc.org/uploads/1/3/1/6/131637055/1586852.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/90076071696.pdf
    • https://cdn.shopify.com/s/files/1/0434/3840/7845/files/55624199604.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zobirunutopuwipigodilig.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/javesojokige.pdf
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/loneduxuwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/muvera.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4555/files/58447713772.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/50389720790.pdf
    • https://cdn.shopify.com/s/files/1/0438/7107/6520/files/gepajufin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45598155969.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/rezeraluwufososurigop.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/lolaxivigazuv.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_off000072b9.bin
382d570601bdd521d1c89944845b958cc82ac5f30596bb5cf0e6046dd8b54b9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B9 6452 bytes
font_01_sfnt_off000087c9.bin
274a7ef600274536f0a34dddb0c2161a3c687c77cc74c3aa89d0b4740ff94739		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87C9 16804 bytes

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