Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd3ac1158cfc5c8…

MALICIOUS

PDF

40.9 KB Created: 2020-08-24 09:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fe2e73f95af5b0352111b470d968087 SHA-1: 1c3227e4278f7f70065f7c77cc8ecd93f2bf9476 SHA-256: 6cd3ac1158cfc5c89bd313467a62706fe25129b1ec13a599c7c1ca3e18518083
162 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service that is known to host malicious content, disguised as a lure for 'spotify premium apk'. The ML classifier strongly indicates maliciousness. The document body and embedded URLs suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=spotify+premium+apk+2017+android
    • http://files.bodegamaya.com/uploads/1/3/1/6/131606165/1939988.pdf
    • http://futamip.occidentallodge436.com/uploads/1/3/2/8/132814742/d992e8421a.pdf
    • http://povusixu.uk.lollandfalsterairport.dk/uploads/1/3/1/0/131070722/vexugik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/5549/5833/files/56296570633.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/66854556359.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1532/files/1134603845.pdf
    • https://cdn.shopify.com/s/files/1/0436/2525/0974/files/moxutitigalet.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/gazelaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/delinadoxak.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/gukoluwinusamepoxu.pdf
    • https://cdn.shopify.com/s/files/1/0462/6415/6317/files/what_contemplate_mean_in_arabic.pdf
    • https://cdn.shopify.com/s/files/1/0439/8238/9406/files/anticipatory_grief_scale.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/pufevarade.pdf
    • https://cdn.shopify.com/s/files/1/0431/3494/3388/files/nifenadeko.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_off00006073.bin
35631780ea75a664a14b7d9e7b82d03814a282b6897308f1c86c5511b52e5e56
pdf-font-stream PDF embedded font (sfnt) at offset 0x6073 5652 bytes
font_01_sfnt_off000073b3.bin
d9e77073494e1231b32cc114499e7a1f94c2c6db10efbfcb7fa1cbbbf1168713
pdf-font-stream PDF embedded font (sfnt) at offset 0x73B3 10400 bytes