Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f13f9f8ff75329…

MALICIOUS

PDF

52.9 KB Created: 2020-08-09 15:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a80c62c94da2d5060d4f2a57fd0bc9e5 SHA-1: ea9d837052972d0306a0add7dbaf5039dd68d51b SHA-256: 49f13f9f8ff75329ec8fa6eadfbde73552a579701d1369a1d2ae23fce91828a0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=arduino+beginner+pdf', is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to this malicious URL and other PDF links, suggesting a social engineering lure to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=arduino+beginner+pdf
    • http://files.xingmc.de/uploads/1/3/0/7/130740323/e51c4.pdf
    • http://files.ksah.com.au/uploads/1/3/0/8/130814055/7794034.pdf
    • http://files.theinspiracy.com/uploads/1/3/2/3/132303083/zuzaborabitaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/danavogigoranerupipe.pdf
    • https://cdn.shopify.com/s/files/1/0448/4349/9677/files/sales_executive_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/29652039959.pdf
    • https://cdn.shopify.com/s/files/1/0436/8397/1237/files/10476812949.pdf
    • https://cdn.shopify.com/s/files/1/0428/5110/6972/files/42109374411.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1651/files/70129472120.pdf
    • https://cdn.shopify.com/s/files/1/0429/0658/3203/files/51079665741.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/demowanoxanoxov.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/one_motion_paint.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0810/files/cholesterol_lowering_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/los_4_acuerdos_de_la_sabiduria_tolteca.pdf
    • https://cdn.shopify.com/s/files/1/0436/4166/7734/files/sociology_igcse_notes.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/89175507129.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000891f.bin
6aec8cf18b6b4617fe9d2dfd8f20ae11b355a87079a47ab0c20872dca74bb380		 pdf-font-stream PDF embedded font (sfnt) at offset 0x891F 4920 bytes
font_01_sfnt_off000099ed.bin
1beb553df6e28a9288a4946c3e501ab99cf359e122fa92ba64a2a852efb6a3b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99ED 14444 bytes

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