Malicious PDF — malware analysis report

Static analysis result for SHA-256 73130a2d0e4141bb…

MALICIOUS

PDF

42.7 KB Created: 2020-08-17 00:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69b3933fb0f2da14cfc15b3d45e6bce2 SHA-1: 8dc5f01598aba2a6e7957cd9c785034187b88375 SHA-256: 73130a2d0e4141bb7bbcb5428cb70c187ed64c4edefa528bc00b9783f7cf6a59
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 pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at ttraff.com. This suggests a phishing or redirection attempt, likely to lure users to malicious content or exploit kits. 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=adverb+of+time+worksheets
    • http://files.katiebeaneyoga.com/uploads/1/3/2/6/132681863/fakew.pdf
    • http://files.latitudegeography.org/uploads/1/3/0/7/130776131/komebuni-rezen.pdf
    • http://files.pawsitive-dog-training.com/uploads/1/3/2/7/132740377/6fd1ba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/cardiogenesis_embriologia.pdf
    • https://cdn.shopify.com/s/files/1/0433/1628/1512/files/78729259133.pdf
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/41319969872.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8496/files/96922326960.pdf
    • https://cdn.shopify.com/s/files/1/0431/9949/6351/files/tanukiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7053/7374/files/70222124255.pdf
    • https://cdn.shopify.com/s/files/1/0429/8522/6393/files/like_a_prayer_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0440/4966/2117/files/how_to_connect_git_bash_to_github.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3845/files/angiogenesis_in_cancer_vascular_rheumatoid_and_other_disease.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/soparuvuridove.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/49154107050.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_off00005939.bin
8344695c3d0170c750de78e0ecf5e9e0727c277f574b4419fe288e5162fcaa86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5939 4932 bytes
font_01_sfnt_off00006a10.bin
b652e72d9bbb3181e0e865909bafdc5876436b5442d72f19df5c166b6fc7639f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A10 10748 bytes
font_02_sfnt_off00008ea7.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA7 4324 bytes

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