Malicious PDF — malware analysis report

Static analysis result for SHA-256 7793fef0dd35092c…

MALICIOUS

PDF

45.4 KB Created: 2020-08-12 00:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed15319a215cddf85619e2089343d74a SHA-1: 4d2777c4dbe7068096f2f1290d1875ed8fb975ed SHA-256: 7793fef0dd35092cd14378fb8e5bbb58fec664201c2a41566c0b09149b2d21f7
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'dosis cefadroxil anak pdf' and the URL 'https://ttraff.ru/pify?keyword=dosis+cefadroxil+anak+pdf', suggesting a lure for medical information or a scam. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the redirection to malicious infrastructure via embedded links.

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=dosis+cefadroxil+anak+pdf
    • http://files.drharrold.com/uploads/1/3/1/3/131398582/141cd7.pdf
    • http://files.nsuasda.org/uploads/1/3/0/8/130814874/84afa1c4d5db6.pdf
    • http://files.thefifacorruptionscandal.com/uploads/1/3/1/8/131872087/46810.pdf
    • http://files.karenabryantllc.com/uploads/1/3/1/4/131453329/porufavezoli_rezisunagix_sutegugajo_sadukaf.pdf
    • http://watuketi.decisivemomentsph.com/uploads/1/3/1/4/131453540/113263.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kufotiniponekurek.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/nusenur.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2051/files/the_jaunt_full_text.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/minecraft_exit_code_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/67509668310.pdf
    • https://cdn.shopify.com/s/files/1/0430/9791/5545/files/26978250018.pdf
    • https://cdn.shopify.com/s/files/1/0431/9313/9364/files/32666057646.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99289858455.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/23577109397.pdf
    • https://cdn.shopify.com/s/files/1/0448/2488/7456/files/example_of_simple_acknowledgement_in_research_paper.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28650507632.pdf
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/36873966576.pdf
    • https://cdn.shopify.com/s/files/1/0434/5793/7561/files/regudusa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/pibogepoperodugavalumome.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_off0000746b.bin
3cb90a34867aeaf321d46dba01a1820059b1692b9c653109e3b85a81a7224b27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x746B 5280 bytes
font_01_sfnt_off00008671.bin
81b4f3a1614dd406c192a91ca927f14bf9d84f4f792d6e9c71930dd99f96bcb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8671 9956 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.