Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa2d0980a5f58982…

MALICIOUS

PDF

46.4 KB Created: 2020-08-12 22:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ee3e0581f3d22eee3b6c64aa0b5bc10 SHA-1: 0448abad8afaeccda518ff11ef3718071496c6f7 SHA-256: aa2d0980a5f58982369e8a3351e0ae2d35150b37c3368626dceaf0507c28f1d4
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=canetti+auto+da+fe+pdf'. Another critical heuristic identified a large number of external PDF links, suggesting a link farm designed to manipulate search engine results or distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and URLs, further supporting the malicious intent.

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=canetti+auto+da+fe+pdf
    • http://mulowod.ayishamoss.com/uploads/1/3/1/0/131070420/5418802.pdf
    • http://files.oakwoodcometsbaseball.org/uploads/1/3/0/7/130739962/6a1f13cd.pdf
    • http://files.bluefinmiddletonma.com/uploads/1/3/1/3/131379833/689f3a88466efe.pdf
    • http://fodix.jmr-art.com/uploads/1/3/1/6/131607600/japakamubuwujub_konej_gupanaxezu.pdf
    • http://fogunumom.magdalenecarmen.com/uploads/1/3/1/4/131453060/5780102.pdf
    • https://cdn.shopify.com/s/files/1/0432/1430/7496/files/dikudababovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0133/1360/files/luzavupipezepulowab.pdf
    • https://cdn.shopify.com/s/files/1/0446/1661/4051/files/calibration_methods_in_analytical_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7181/files/calligraphy_exercises_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/kofolimejedonevowibipiza.pdf
    • https://cdn.shopify.com/s/files/1/0436/0660/5987/files/junozuwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/rafidevi.pdf
    • https://cdn.shopify.com/s/files/1/0447/9827/9841/files/2015_hyundai_sonata_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vazakiliduvapi.pdf
    • https://cdn.shopify.com/s/files/1/0439/1131/5611/files/21055011803.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_off00007a9d.bin
752b2e3ad3ec911829c690e24de63e1f2cc89df665ce52243cdf9f5c908eefc4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9D 4632 bytes
font_01_sfnt_off00008a7d.bin
d715a99893d80d68e1032694a3e1237e98f9adf7394592868a2483620dc7ca61
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7D 10120 bytes