Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7d563721c24ef8…

MALICIOUS

PDF

44.8 KB Created: 2020-09-12 03:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc151b1a12b755d44c58b0b63b7016db SHA-1: 571e75e43017309288bf4b7eca7c82aa92bc0190 SHA-256: 9f7d563721c24ef85abf3e154a63eff6334e46d1035fb039af467f1f66192378
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one pointing to a known malicious redirector at `https://ttraff.club/wix?keyword=free+template+wordpress+education`. The document body, though heavily obfuscated, contains text related to free templates and the redirector URL. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent, likely for phishing or malware distribution.

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.club/wix?keyword=free+template+wordpress+education
    • http://files.stoneyacresretrievers.com/uploads/1/3/0/9/130969160/33a9335fe301b.pdf
    • http://fafig.johnsom.com/uploads/1/3/1/6/131606490/godemumisa_noxobifafev_xotefe_muxeneroxusopij.pdf
    • http://zofudav.henningrestorations.com/uploads/1/3/0/7/130738970/e9c382be68a.pdf
    • http://files.perfectlyimperfectcollegian.com/uploads/1/3/2/7/132741241/moxokewajesatuvoli.pdf
    • http://files.kahaboutique.com/uploads/1/3/0/8/130814758/d3913f110297095.pdf
    • https://static.usrfiles.com/ugd/681527_e7dc5387150545cbbc9a182385ed09b2.pdf
    • https://static.usrfiles.com/ugd/921909_7e5a85b535e341ae8cc089775076325e.pdf
    • https://static.usrfiles.com/ugd/80c1db_d92cf01064da47cda0308bc47e571ed3.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed579ad385854d5c88d434ac03084648.pdf
    • https://static.usrfiles.com/ugd/9e41f0_58b481b8f7834865b57e3ff7a013ad82.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/zexuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0736/files/mejufanitus.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/noaa_weather_report_gulf_of_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0439/5627/3310/files/sag_mal_2nd_edition.pdf
    • https://static.usrfiles.com/ugd/61c57f_d6635fbc041e4ee590c6197f8c7e8830.pdf
    • https://static.usrfiles.com/ugd/008a9f_b013c24d54f445bd8192f34ddd46f465.pdf
    • https://static.usrfiles.com/ugd/7ff653_8f7fe80f7c1343f3965cfed86725daa2.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_off00006581.bin
ba541695a384db6937415aa5c0a0f13c5e9dcfd707a16692932a9297909077ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6581 5148 bytes
font_01_sfnt_off000076f1.bin
0160f06a16a178c22bc23862fb2507f8d6dac7b908333565957066f564e34c75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F1 9712 bytes
font_02_sfnt_off000097f2.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97F2 4324 bytes

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