Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b52090c7bac8a2…

MALICIOUS

PDF

51.1 KB Created: 2020-08-23 11:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd5a909dfed800402c4b090fe1a0c334 SHA-1: 10370b8fb6c3e0bcbc0c22d5c1b1e4e9115f57dc SHA-256: 86b52090c7bac8a27603db4128c6815f36e30deffa06d2ba5bc946607c1e90f0
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a report, and the primary malicious URL is `https://ttraff.com/pify?keyword=beps+action+4+final+report+pdf`. This suggests a phishing attempt where the user is directed to click the link, leading to malicious content. No scripts were extracted, limiting the analysis of further execution chains.

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=beps+action+4+final+report+pdf
    • http://sudipu.muffbrandboards.com/uploads/1/3/0/7/130776167/xidemotizopis-tobagizekek-kuxobetom.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7971/files/39187206225.pdf
    • https://cdn.shopify.com/s/files/1/0434/3804/7384/files/sirafanorupojemaredipowut.pdf
    • https://cdn.shopify.com/s/files/1/0430/2392/5402/files/glossary_of_strategic_management_terms.pdf
    • https://cdn.shopify.com/s/files/1/0432/4252/0739/files/samoridag.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/95407460932.pdf
    • https://cdn.shopify.com/s/files/1/0435/8373/3915/files/lijosubepe.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/runefewegelonofapire.pdf
    • https://cdn.shopify.com/s/files/1/0431/3671/2861/files/dutovufikososu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5508/6742/files/cbse_syllabus_for_class_12_maths_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0435/5211/2804/files/87156903199.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9726/files/41598489118.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/76155756814.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cc7.bin
462fa3b07e91ce6eb1a8d0ede74e0bc12009605988ca7ee5f0a7a7781ddade9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC7 5072 bytes
font_01_sfnt_off00008e0c.bin
7fe552c89a30d88eecf21b4faed91b3306ebfbd5af7dcc37dd79d75d490132a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0C 10424 bytes
font_02_sfnt_off0000b1ae.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1AE 4324 bytes