Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ead65318a557c17…

MALICIOUS

PDF

53.5 KB Created: 2020-08-29 20:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 418b01a51e25b31195f3a316a3cbb783 SHA-1: 30766e9bf53073ae2e758ea9bb10a8f04cf459df SHA-256: 6ead65318a557c17495bb3cd5973af34a14edcb1e57bae3472e5ec55df875da5
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm designed to obscure the malicious destination. While no scripts were extracted, the overall structure and the malicious URL indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/wix?keyword=juegos+para+emulador+ppsspp+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2090/9718/files/ginixapo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7761/5262/files/60648348422.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/99852403364.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/tikoziraverosowubesir.pdf
    • https://cdn.shopify.com/s/files/1/0429/4384/0412/files/abscesso_pulmonar.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa573429fb52486d9ceffad07794d9fb.pdf
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/vivusugirarixon.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/31983514390.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8496/files/92544856220.pdf
    • https://cdn.shopify.com/s/files/1/0441/1473/9352/files/7451543825.pdf
    • https://cdn.shopify.com/s/files/1/0438/6314/6656/files/4659978451.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e60.bin
b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E60 6744 bytes
font_01_sfnt_off00007f45.bin
4566ca4b2812da98a7b573eb346b22a3563cfc8321c68398871fb4982bb5ad60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F45 5268 bytes
font_02_sfnt_off00009111.bin
78e94e2e47178245ca437e301e19f50dc99845ecc02da2ba30fe2b1e34051cc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9111 2092 bytes
font_03_sfnt_off00009ab6.bin
0bc36b6637b778f74b42a3125987144bddc5e7c655b0e9d1c8e7c1c2b3fc280f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB6 13636 bytes

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