Malicious PDF — malware analysis report

Static analysis result for SHA-256 d795b8e0345982bc…

MALICIOUS

PDF

51.7 KB Created: 2020-08-05 07:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d12d7af4891f23f5949f04cfc8a97dc3 SHA-1: c06237596d9d5d3526f12749af536795abf1b8eb SHA-256: d795b8e0345982bcb8c7ac4c9880b8bd7cad1cae1f35b4727760a7e6b4fa5045
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially obfuscated, contains text related to 'antimicrobial activity of allium sativum' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious nature of this PDF.

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=antimicrobial+activity+of+allium+sativum+pdf
    • http://loseru.lawallab.org/uploads/1/3/2/8/132816066/bazapa.pdf
    • http://files.ameliahamiltonfit.com/uploads/1/3/2/7/132740665/jodalapesovesu-fapode-pubagezokatade.pdf
    • http://files.primariuscorpservices.com/uploads/1/3/1/3/131397964/bezefifa.pdf
    • http://gojarat.sethled.com/uploads/1/3/1/6/131606069/b746e.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/83619844792.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wijabogose.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/79373061673.pdf
    • https://cdn.shopify.com/s/files/1/0433/2807/7992/files/85555434467.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1317/files/bexadavuluwamixotapefug.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/mavevuwog.pdf
    • https://cdn.shopify.com/s/files/1/0430/7861/5189/files/lejoluxedegutasuma.pdf
    • https://cdn.shopify.com/s/files/1/0437/8358/5953/files/julubekukatitonom.pdf
    • https://cdn.shopify.com/s/files/1/0436/7374/7609/files/vepisisagulefaxos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21096031872.pdf
    • https://cdn.shopify.com/s/files/1/0435/3549/9418/files/bivozadinefepik.pdf
    • https://cdn.shopify.com/s/files/1/0437/1624/7703/files/tovufibinisepuwasebu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/boris_the_bullet_dodger.pdf
    • https://cdn.shopify.com/s/files/1/0430/3139/6501/files/55709497821.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_off00008b54.bin
a5ff0ecd0a0ad6818a782e57118225f5adc01ea588158fad3923cc5dee6ba4a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B54 5592 bytes
font_01_sfnt_off00009e4e.bin
0823536f86211261b2713d725c9d307b51db8ec6c8efafe68856bab3573c419b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E4E 10216 bytes

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