Malicious PDF — malware analysis report

Static analysis result for SHA-256 071b9615bbf5547e…

MALICIOUS

PDF

44.4 KB Created: 2020-08-22 05:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bd09d9fd41cb09c544caff287d4ab78 SHA-1: dad24bb19d043dc8c550de102a75e87aa67597e4 SHA-256: 071b9615bbf5547e1d6724313b9b356abb8be84cec3b983aa50ad80b470104df
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=telecharger+alter+ego+b1+pdf+gratuit'. It also exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify domains. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves redirecting the user to a malicious site via the embedded link.

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=telecharger+alter+ego+b1+pdf+gratuit
    • http://files.macgymohio.com/uploads/1/3/0/8/130874143/jovulugutuko.pdf
    • http://files.silverlining-press.com/uploads/1/3/0/8/130814286/vovomexutosiko.pdf
    • http://files.manitobalivinghistory.com/uploads/1/3/1/4/131438296/9055353.pdf
    • http://jimep.everythingmotorcyclerider.com/uploads/1/3/1/8/131857920/5031772.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0465/4530/5750/files/jezimesopojolojitofomow.pdf
    • https://cdn.shopify.com/s/files/1/0432/1411/0880/files/32883516771.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/ridusomiwuvumobiti.pdf
    • https://cdn.shopify.com/s/files/1/0430/5374/4279/files/sawonuno.pdf
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/modern_calligraphy_fonts.pdf
    • https://cdn.shopify.com/s/files/1/0437/6359/7473/files/junarasepejesepu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/psychogenic_non_epileptic_seizures.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3215/files/24200788063.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/mac_reduce_file_size_quartz_filter.pdf
    • https://cdn.shopify.com/s/files/1/0459/2258/2679/files/91676873637.pdf
    • https://cdn.shopify.com/s/files/1/0437/8614/1847/files/jemuwosipujefijexonewereg.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8174/files/25041888874.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ce.bin
e411d37a5df07a373780fb9e2becbb39e87c9c0693aff96aea4402823cf2e43c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62CE 5156 bytes
font_01_sfnt_off00007469.bin
08bf477857262bec0f94a8f1ace74db57c803a5394abb1821b176842c4484452		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7469 9920 bytes
font_02_sfnt_off00009678.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9678 4324 bytes

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