Malicious PDF — malware analysis report

Static analysis result for SHA-256 03fa141e8387df38…

MALICIOUS

PDF

74.2 KB Created: 2020-08-31 22:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bca877f6651ddf6c5cdd097afe49a49b SHA-1: cc486c4f65f0d91f4e1687e0aa90aa0f5cf77e88 SHA-256: 03fa141e8387df3846fad5299c24d1182f200cc78c814e56de129f3f1d684966
154 Risk Score

Malware Insights

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

The PDF contains a deceptive lure related to 'free shed plans' and embeds a URL that points to a known malicious redirector. The ML classifier strongly indicated maliciousness, and the PDF structure includes a large number of external links, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the embedded URL is the primary indicator of 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.cc/wix?keyword=free+12x10+shed+plans+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_997ae683a9c349bf93a1d04be82e9c43.pdf
    • https://static.usrfiles.com/ugd/b8c837_47bf84b640f6426cb4871c64fbd75f2b.pdf
    • https://static.usrfiles.com/ugd/0779a3_757ec943328d495dad31aa676efed3aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd07b4a2eac2446b842baa1a30769680.pdf
    • https://cdn.shopify.com/s/files/1/0431/5175/3380/files/67539336382.pdf
    • https://cdn.shopify.com/s/files/1/0430/3188/8035/files/arteriosclerosis_sintomas.pdf
    • https://cdn.shopify.com/s/files/1/0429/8162/1919/files/wunozaxegaxo.pdf
    • https://cdn.shopify.com/s/files/1/0452/7433/3346/files/ielts_writing_task_2_academic_band_9.pdf
    • https://static.usrfiles.com/ugd/122077_36df94201bb74e3a87204104992c471e.pdf
    • https://static.usrfiles.com/ugd/9b33c5_75a0d62c8db74964b4b8e859850b45b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9392a70f8ec467386929bbfc7143704.pdf
    • https://static.usrfiles.com/ugd/b8c837_34c3d8857fb047e7a1b7ed9bca08d85a.pdf
    • https://cdn.shopify.com/s/files/1/0438/3545/7696/files/sammamish_wa_weather.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/fubef.pdf
    • https://cdn.shopify.com/s/files/1/0434/7409/2196/files/vidmate_video_ing_karne_wala_file.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/norojakibi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da29.bin
aa755f6becbea12c905569d53dd62a3813fb484f9fd01df242d65324972db4bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA29 5028 bytes
font_01_sfnt_off0000eb2e.bin
c643b8b525b12aa3b7256c27264eccf50ac608f6bbe6677de658d15abfbefc2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2E 10000 bytes
font_02_sfnt_off00010d89.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D89 4324 bytes

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