Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f53098d649e6fdf…

MALICIOUS

PDF

43.0 KB Created: 2020-08-23 08:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 802d4396093102a094c58e5150eca99a SHA-1: 783273e183e570298d23c328ee32a895830063b6 SHA-256: 0f53098d649e6fdf9dc823f6f00c96d9dc61ef907e4df0f8732f8242159f4f3e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, disguised as a movie title, redirects to a known malicious domain (ttraff.com). This suggests a phishing or redirection campaign, likely intended to lead users to malicious content or further compromise. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=commandos+3+destination+berlin++full
    • http://tagemovi.cos-medics.com/uploads/1/3/0/7/130776445/noxuwixiz.pdf
    • http://files.christiestimber.com/uploads/1/3/1/4/131437229/1e19c.pdf
    • http://sewuzovo.titusvillesummertheater.com/uploads/1/3/2/8/132814930/levifixerowakoz.pdf
    • http://wufubimin.westportyarns.com/uploads/1/3/1/4/131453784/9471380.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/pagebobixe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4561/6792/files/gobomamowejuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/dazujimaxevemisutani.pdf
    • https://cdn.shopify.com/s/files/1/0437/8073/5138/files/literacy_skills.pdf
    • https://cdn.shopify.com/s/files/1/0432/2387/5746/files/cambridge_primary_english_phonics_workbook_a.pdf
    • https://cdn.shopify.com/s/files/1/0448/0591/4775/files/informasi_apbn_2015.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7348/files/6392889435.pdf
    • https://cdn.shopify.com/s/files/1/0438/6032/8608/files/23978849863.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/princess_jasmine_coloring_pages.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7815/files/66658614546.pdf
    • https://cdn.shopify.com/s/files/1/0440/2744/5398/files/19251537421.pdf
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/pexeva.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006580.bin
4f60d19d90ff9152d0a63a0148d104fd8188fb12bfdabca422ceb1cada4db6e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6580 5264 bytes
font_01_sfnt_off0000773e.bin
23ee11004cc2c531f0d278c3bd227fa2a36e3a33daf73900d6f2f872bceaffb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773E 12392 bytes

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