Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea0305f2e7694b0…

MALICIOUS

PDF

52.8 KB Created: 2020-08-17 16:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8b8d86a93b58c706a4ee18b06898517 SHA-1: 9f35cdbc9a960445cdb9f289faaa608629426047 SHA-256: dea0305f2e7694b0129cd89c7882fa361096df55b67895bc3ebebd63edccfd69
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt. The document body, though partially corrupted, contains text related to a search query for 'parkovac kamera wifi android', suggesting a lure. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.cc/pify?keyword=parkovac%25C3%25AD+kamera+wifi+android
    • http://rarureku.gympiemassage-rehab.com/uploads/1/3/1/4/131482992/walagajaludanis.pdf
    • http://files.melissasmith.net.au/uploads/1/3/1/3/131381799/mevazixut.pdf
    • http://finof.kicksvilleshop.com/uploads/1/3/1/6/131636665/vetif.pdf
    • https://cdn.shopify.com/s/files/1/0438/6694/7744/files/butakenenomivijazeja.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/easy_budget_template.pdf
    • https://cdn.shopify.com/s/files/1/0447/9365/9543/files/98870372054.pdf
    • https://cdn.shopify.com/s/files/1/0434/7671/3637/files/68292333333.pdf
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/83369461644.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/40891422821.pdf
    • https://cdn.shopify.com/s/files/1/0437/9269/5456/files/57393641060.pdf
    • https://cdn.shopify.com/s/files/1/0436/7525/4937/files/dodebesalatanalitup.pdf
    • https://cdn.shopify.com/s/files/1/0439/0181/2888/files/erythema_multiforme_steroids.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9941/files/panelinamegujubawun.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_off00008a80.bin
3dcd2c1bad6628e9c63627cded4b051ea5ac214494324ad6f88f25360f4da88f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A80 5228 bytes
font_01_sfnt_off00009c52.bin
4a91ef69a6e3d425a49f6196fc9c43f74d54fec17d3a43ba280e354822f2426a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C52 12852 bytes