Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d34e225c0465ab…

MALICIOUS

PDF

43.5 KB Created: 2020-08-10 12:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef508ec3ec38e12ee7a987aa7980c2f1 SHA-1: 7fb5a37cc67c095ed8e47d13990a7eded880b8c5 SHA-256: 00d34e225c0465abb5f47680fb7e266b04962a65f85e0ff3ce3dd08edd205837
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=aeration+of+water+pdf'. Another critical heuristic indicates this is a PDF link farm, with many links pointing to external PDFs. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern is to lure users into clicking malicious links, likely leading to further compromise.

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=aeration+of+water+pdf
    • http://files.silverlakebarroncounty.com/uploads/1/3/2/7/132712358/9313b8677fc0f.pdf
    • http://lapax.lwvmeph.org/uploads/1/3/0/8/130874422/garev_gotamawonozajaz_wowajo.pdf
    • http://files.wahawkbands.com/uploads/1/3/0/7/130739697/5642108.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3080/4637/files/ralezizifa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/18692245194.pdf
    • https://cdn.shopify.com/s/files/1/0433/9384/3358/files/bixadujigo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/dafawewuxazogefu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9721/1551/files/application_letter_for_job_employment.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1415/files/47012521950.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wurawosupamajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/zekigedejewojo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/jspdf_autotable_multiple_tables.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/mark_sanchez_career_earnings.pdf
    • https://cdn.shopify.com/s/files/1/0438/2697/0786/files/logumufosavilezonuzesafe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/tixibogiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/2151/6448/files/gidozip.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/vapazovavutupodoxe.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_off00006ebd.bin
3536e200b04305af11121864b8645253eb419ccaa1909a918e11f50526025cb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBD 4908 bytes
font_01_sfnt_off00007f92.bin
ead6d2142f56a98b0f8cf45f3d6574089ec6ddf65d5bb7df5df913cb44fe4938		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F92 9844 bytes

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