Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e4f1ed142c7d86c…

MALICIOUS

PDF

36.4 KB Created: 2020-09-23 00:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5c9ad4f6b835c301da8c40e7b6a6dff SHA-1: b0df0f33e851000919c9296bc3f2e67ebf87bab3 SHA-256: 5e4f1ed142c7d86cc7b87b5b3e0b5ed06948c6e610036f554c349b811440d017
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a redirector known for malicious activity. The document body, though obfuscated, contains a URL that appears to be part of a link farm designed to attract traffic. The primary malicious URL identified is https://ttraff.me/wix?keyword=minnesota+leisure+time+physical+activity+questionnaire+%2528mltpaq%2529, which is likely used for phishing or to deliver a secondary payload.

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.me/wix?keyword=minnesota+leisure+time+physical+activity+questionnaire+%2528mltpaq%2529
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://744c8dd5-57ff-4137-a183-187b445776c7.filesusr.com/ugd/6cf804_3d807c8820ca4246931985c8701e9bb3.pdf?index=true
    • https://9ce15f5c-5005-4931-a5cb-7602f8563776.filesusr.com/ugd/145364_a827d48d7904415ba284ca099a97b071.pdf?index=true
    • https://f2a7b771-cdf9-461b-839b-1d3785a14b55.filesusr.com/ugd/d6b5da_a83f58e2514b487387ffdc0c4b72e57b.pdf?index=true
    • https://d8e5bd29-fcce-4009-a8ba-a95a4e342cc5.filesusr.com/ugd/b52961_ec54bdcbf1414fed9428e7dbbaebb827.pdf?index=true
    • https://4aba3ef4-41ab-4f15-9e3e-d5371ebd4363.filesusr.com/ugd/9eb187_e6cb7cb279234841a5284c5bf1758377.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/88934906060.pdf
    • https://cdn.shopify.com/s/files/1/0438/4528/8093/files/titudababigibakago.pdf
    • https://cdn.shopify.com/s/files/1/0432/7292/9435/files/the_insulin_factor.pdf
    • https://cdn.shopify.com/s/files/1/0431/3455/0177/files/wosudenamot.pdf
    • https://cdn.shopify.com/s/files/1/0431/8534/0580/files/20302984935.pdf
    • https://cdn.shopify.com/s/files/1/0435/8445/4817/files/five_nights_at_anime_2_game.pdf
    • https://cdn.shopify.com/s/files/1/0435/3094/4671/files/android_google_maps_save_current_location.pdf
    • https://cdn.shopify.com/s/files/1/0438/0036/3169/files/education_in_south_africa_after_apartheid.pdf
    • https://cdn.shopify.com/s/files/1/0479/4784/1703/files/flux_defense_brace_p320.pdf
    • https://cdn.shopify.com/s/files/1/0488/0472/4901/files/cooper_discoverer_h_t_plus_reviews.pdf
    • https://cdn.shopify.com/s/files/1/0434/8382/4294/files/72616111396.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_off00004d71.bin
115316eebdb8c378cbed019a161d5f18e97d47cf7573e72466502fb929c97d10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D71 5620 bytes
font_01_sfnt_off0000608b.bin
203b9c2773af39b5ed9cf18657430cce2e6500bdb15b7088d7a6712b65b0476e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x608B 10532 bytes

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