Malicious PDF — malware analysis report

Static analysis result for SHA-256 864819bf331a346d…

MALICIOUS

PDF

44.9 KB Created: 2020-08-05 05:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 570074739b2cd48f972032ae8a0af57e SHA-1: 01c8cd9d5c37eb1d46432dbd623293b153ed19a0 SHA-256: 864819bf331a346db878bde95aea5ddddfc9b32d7b85b261adaeed5b31deee71
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=satyanarayana+biochemistry+free+pdf+download'. While many other links point to benign Shopify domains, the presence of the malicious redirector is a strong indicator of malicious intent. The document body contains garbled text but includes the malicious URL and several benign URLs, suggesting an attempt to disguise the malicious link within a large number of seemingly legitimate ones.

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.ru/pify?keyword=satyanarayana+biochemistry+free+pdf+download
    • http://files.waltonbarrowboardofrealtors.com/uploads/1/3/2/6/132681356/xexabetozef-sedelufi-kidogabavaxef-wapokut.pdf
    • http://files.alldogstoronto.com/uploads/1/3/0/8/130874394/tefow_vopuwipeb_degufuxedopu_fukebividek.pdf
    • http://xagik.newfrousy.org/uploads/1/3/1/1/131163658/1692984.pdf
    • http://files.harrisondomain.org/uploads/1/3/1/3/131380875/1555419.pdf
    • http://files.hypnobabieswithlauren.com/uploads/1/3/1/1/131163853/zijonureposi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/1177716733.pdf
    • https://cdn.shopify.com/s/files/1/0440/0542/5310/files/43613637804.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/kemagufibolimobibolameg.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6218/files/91827287190.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/44695083103.pdf
    • https://cdn.shopify.com/s/files/1/0429/8070/4405/files/cathode_ray_oscilloscope_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7110/files/50515071581.pdf
    • https://cdn.shopify.com/s/files/1/0438/8601/8712/files/30792218791.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/nedex.pdf
    • https://cdn.shopify.com/s/files/1/0429/1005/6615/files/61502875924.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/bobopigitafebige.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/uf_admissions_office.pdf
    • https://cdn.shopify.com/s/files/1/0435/5073/6533/files/2015_international_building_code_study_companion.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062e9.bin
85132ac11229b1f841e04a06e99da56d9ad9a81dc8d930d259354f9541231a57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E9 5620 bytes
font_01_sfnt_off000075dd.bin
d6844f56f9d2e21864322f5bf3b175688a01106a8e3ebe6ffdf05c24edfa05c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DD 9988 bytes
font_02_sfnt_off00009809.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9809 4324 bytes

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