Malicious PDF — malware analysis report

Static analysis result for SHA-256 e883d0210be4a7a0…

MALICIOUS

PDF

43.5 KB Created: 2020-08-10 16:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e39b3b4ba6ae8e04e8d23b935f2a1bf SHA-1: a0198a9a4a81b9cfbcddaff63f1c35732354dfa0 SHA-256: e883d0210be4a7a078ce25804ab2d5b2043e795a15532401893f08fdbcc95a2b
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The document body contains numerous URLs, including a suspicious redirector at 'https://ttraff.ru/pify?keyword=carnival+of+venice+paganini+pdf' and many links to PDFs hosted on Shopify domains, suggesting a coordinated effort to distribute content or manipulate search rankings. No scripts were extracted, but the sheer volume of links and the critical heuristic firings strongly indicate a malicious intent, likely for phishing or malware distribution.

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.ru/pify?keyword=carnival+of+venice+paganini+pdf
    • http://xusixe.canterburynu.org/uploads/1/3/2/6/132681670/e7f2c.pdf
    • http://files.5thstreetfinancial.net/uploads/1/3/0/7/130739564/8840780.pdf
    • http://files.plewisheatingandplumbing.co.uk/uploads/1/3/1/6/131606876/nivakudowulerapurofe.pdf
    • http://files.lynneawashburn.com/uploads/1/3/0/9/130969967/95f5f5ef.pdf
    • http://files.lauraberry.co.uk/uploads/1/3/1/3/131380126/volimedipelaker-berenavos.pdf
    • https://cdn.shopify.com/s/files/1/0437/4475/5866/files/vexepusezopigopote.pdf
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/xolijegimejurureligixoduf.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/52449197060.pdf
    • https://cdn.shopify.com/s/files/1/0437/3577/7445/files/xipelobavasopifaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/2009/8472/files/11281905155.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/sasepoxatel.pdf
    • https://cdn.shopify.com/s/files/1/0437/7418/1534/files/nmeros_primos_e_compostos.pdf
    • https://cdn.shopify.com/s/files/1/0437/5805/9674/files/beethoven_s_silence_ernesto_cortazar.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/windows_7_enterprise_activation.pdf
    • https://cdn.shopify.com/s/files/1/0438/3876/7266/files/90712801214.pdf
    • https://cdn.shopify.com/s/files/1/0432/4317/6091/files/advertising_company_profile.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/adjectif_possessif_exercices.pdf
    • https://cdn.shopify.com/s/files/1/0431/1026/9085/files/moxanafedebulurebaduxika.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_off00006b4b.bin
f0281cb407990398b85626d596ce8c5e9d177f6fb4a28fcdf01bf95799e90220		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4B 5112 bytes
font_01_sfnt_off00007cc5.bin
a1b70a4a54db17fcd49661c5ad7bca1736d42b8418a85d95d018a1218816cd47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC5 10832 bytes

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