Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf0f7a4280f9a18…

MALICIOUS

PDF

37.2 KB Created: 2020-08-27 23:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8da28d105841ec569b52bc8b929b895f SHA-1: 2ccd775bb19b879d421846d3710a1499b4399fb6 SHA-256: 6cf0f7a4280f9a189ccc9a3655e657554cd5a85db7bcf51d401d6645dc999d87
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 the URL 'https://ttraff.link/pify?keyword=little+thirteen+full+movie', which is flagged as malicious. This suggests the PDF is designed to trick users into clicking the link, leading them to potentially harmful content or further stages of an attack. 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.link/pify?keyword=little+thirteen+full+movie
    • http://files.westrutlandfreelibrary.com/uploads/1/3/2/7/132710694/5571609.pdf
    • http://wabilajer.ilcrolla.org/uploads/1/3/1/8/131856158/58f892fa.pdf
    • http://files.soarisemusic.com/uploads/1/3/1/4/131453048/kizigajozuvan_wesumoreg_nivuwotosed.pdf
    • http://files.ryanavery.org/uploads/1/3/2/8/132815298/moviwilenazugel.pdf
    • http://files.ofshawaii.com/uploads/1/3/1/0/131070525/4059996.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/75011788484.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1158/files/3105413135.pdf
    • https://cdn.shopify.com/s/files/1/0435/9333/4952/files/reiseangebote_im_internet.pdf
    • https://cdn.shopify.com/s/files/1/0430/6570/4602/files/95694794154.pdf
    • https://cdn.shopify.com/s/files/1/0435/2809/3850/files/velatimawo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9446/5948/files/simple_timber_frame_house_plans.pdf
    • https://cdn.shopify.com/s/files/1/0433/5576/6942/files/water_carbon_and_nitrogen_cycle_worksheet_color.pdf
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/caller_id_faker_unlimited_credits_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/laxuxiwexovumadumude.pdf
    • https://cdn.shopify.com/s/files/1/0432/6670/3516/files/50448393987.pdf
    • https://cdn.shopify.com/s/files/1/0439/3838/1992/files/kaxidexikuxezotabikatub.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_off0000485d.bin
a3c6c4c8c6d25ef219066b6ed664e8fa8e1e77b8894677d10cd3ea465dfd5d66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x485D 4500 bytes
font_01_sfnt_off0000577a.bin
35925398e4ac213114218b8c36107609dfa2c33f0b9f89d47a05dfd20dbd2a83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x577A 9964 bytes
font_02_sfnt_off000079a1.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A1 4324 bytes

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