Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10ac18b8b788773…

MALICIOUS

PDF

70.8 KB Created: 2020-08-09 23:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc710253b7b1220131c0126bc1115557 SHA-1: 82a004c2017c8e5b6fee94cbd5bd5710c68fc7f5 SHA-256: c10ac18b8b7887733c5159fbc824c689c30786bcf2b15302a812798389c56ded
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Budesonida spray nasal bula pdf', suggesting a lure to disguise the malicious intent. The presence of numerous external PDF links, many hosted on shopify.com, indicates a link farm strategy to potentially improve search engine ranking for the lure content, while the primary malicious redirector is 'ttraff.com'.

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.com/pify?keyword=budesonida+spray+nasal+bula+pdf
    • http://files.divinemercyfamily.org/uploads/1/3/1/4/131407469/delira.pdf
    • http://files.babiesandbackbends.com/uploads/1/3/1/0/131071240/rexakurazo_ruzisigubux_regajefisuwoduk.pdf
    • http://files.homeimprovementandrenovations.com/uploads/1/3/0/8/130874180/5985187.pdf
    • http://vanisevog.emmawilliamsdirector.com/uploads/1/3/1/6/131606289/386071.pdf
    • http://remazelef.bearbugmedia.com/uploads/1/3/2/7/132712207/lilogiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3830/1594/files/33615934948.pdf
    • https://cdn.shopify.com/s/files/1/0436/6876/6873/files/setugolokuxatafofagusobus.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9968/files/bertha_becker.pdf
    • https://cdn.shopify.com/s/files/1/0436/6221/3270/files/category_management_in_purchasing.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/favararizikimuleta.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/86618648987.pdf
    • https://cdn.shopify.com/s/files/1/0430/1222/7225/files/xejadexuzodujuranu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3765/files/windows_xp_hosts_file.pdf
    • https://cdn.shopify.com/s/files/1/0436/3649/0398/files/arab_byzantine_relations_in_early_islamic_times.pdf
    • https://cdn.shopify.com/s/files/1/0435/0679/4651/files/17071194851.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_off0000d28f.bin
99256d3438ca5ba2aea803be2498393897256c2916472f493cc559170ea1411f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD28F 5324 bytes
font_01_sfnt_off0000e4ba.bin
385a3540e3053893e7d1a7b94b3305d78669c4e2d282debf02e88cf08a849b62
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BA 13656 bytes