Malicious PDF — malware analysis report

Static analysis result for SHA-256 195c44266944a957…

MALICIOUS

PDF

41.7 KB Created: 2020-09-17 01:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40b4e40b480aa296ebefaeb775d252ca SHA-1: d61bfc054fb75bb04f47dd165211423d8b462e0b SHA-256: 195c44266944a9572fa4ac24597daa6c18273f51fb496a2326665c8d6fd48895
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a scavenger hunt answer key. This suggests a phishing or social engineering attack aiming to redirect users to malicious sites.

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=constitution+scavenger+hunt+answer+key+government
    • http://vimaz.samahanfilamheritage.org/uploads/1/3/1/4/131437350/5728289.pdf
    • http://mowebamas.prodigyplaza.com/uploads/1/3/0/7/130739080/452c3e.pdf
    • http://pibofa.alysonjill.com/uploads/1/3/0/8/130874253/bobewufu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://16d3ea73-d471-4ec8-8bfb-8d2b8551f8e9.filesusr.com/ugd/1fbf8b_9f561b040c2445e6b7a03ed6be47ae42.pdf?index=true
    • https://e0d710f7-1ef6-4840-a808-d8d5fa211de6.filesusr.com/ugd/d8966e_5f9e8afc74f54134bc7bf0e6d2b70ab2.pdf?index=true
    • https://698f0198-70a1-4677-be39-b8a696bda4b6.filesusr.com/ugd/a6e5e9_333a0030322f402ba21c2a5fd1eed475.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/5407/1957/files/gomejisusu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/walemekujiraduzezuxakiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/0305/2191/files/arby_s_gyros_nutrition_information.pdf
    • https://cdn.shopify.com/s/files/1/0432/8960/8360/files/pedagogy_of_history_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3287/files/ek_bhole_ka_bhagat_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/6707/1894/files/19729818781.pdf
    • https://cdn.shopify.com/s/files/1/0461/5710/3267/files/xikudupagotekitezikit.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_off0000559f.bin
4dbd59b51e2d5774a680609cbf057443214423ee22f57f7c4b84dfec9c5f6a7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x559F 5404 bytes
font_01_sfnt_off000067f4.bin
82cd91204d23970981ffd62f059df679b59d4713f83451bb935443127c4600f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F4 10508 bytes
font_02_sfnt_off00008ba0.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA0 4324 bytes

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