Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb710f62b80c33c…

MALICIOUS

PDF

64.4 KB Created: 2020-08-11 05:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97ea84660ea34a55b4aee5a1607ce242 SHA-1: b2eac0530a8c378f8d2bb30a31c5d015ef1d0949 SHA-256: 6eb710f62b80c33c968826d8ff1be072489e07679016abc88cc704ba17cf2d2e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the presence of a link farm designed to direct users to potentially harmful sites. The document body, though corrupted, contains the malicious URL, suggesting an attempt to disguise malicious activity as legitimate content.

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=noida+metro+route+map+pdf
    • http://files.cveducators.org/uploads/1/3/1/4/131438211/bobiwubitilijev.pdf
    • http://files.medicinalplantsinnigeria.com/uploads/1/3/0/7/130775368/1912077.pdf
    • http://files.sweetwhimsyshop.com/uploads/1/3/1/3/131379276/8580026.pdf
    • http://files.revcarolsaunders.com/uploads/1/3/1/3/131380848/4115784.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kawovuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45366335679.pdf
    • https://cdn.shopify.com/s/files/1/0432/4671/5040/files/kesasilibodetopigurowona.pdf
    • https://cdn.shopify.com/s/files/1/0429/6491/0243/files/fetazukururunixosija.pdf
    • https://cdn.shopify.com/s/files/1/0431/7655/8746/files/pusowusuro.pdf
    • https://cdn.shopify.com/s/files/1/0440/6925/7366/files/review_of_clinical_anesthesia_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1023/6321/files/sufasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0499/files/11725398481.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/93608776612.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008624.bin
3b6f51e613da599ab3a9a6855355e27a7ffac5367dcf618f930b3abdb69a12a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8624 4948 bytes
font_01_sfnt_off000096eb.bin
b3a33f0ef80881b006682d8bd27ca70385261c73525a8c188f8f6e2288c56a1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96EB 12612 bytes
font_02_sfnt_off0000bf54.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF54 16164 bytes
font_03_sfnt_off0000d4a9.bin
6e22767921bd7ae90f587c1247ab5e37bf2e43f1cb9d8c560d4563d1c61d1af8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A9 9596 bytes

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