Malicious PDF — malware analysis report

Static analysis result for SHA-256 54638496537b481a…

MALICIOUS

PDF

48.2 KB Created: 2020-08-12 15:38:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e07081b526e36ef0cd37f680f3179d31 SHA-1: 412df7b26e65d28342a2696fd5353c7145b31f58 SHA-256: 54638496537b481a874eb681c3c39436cb97afadd9ac27b81a218739920c21b5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains with SEO-like slugs, but also includes a critical link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=blue+mountain+village+map+pdf'. This suggests a tactic to drive traffic to malicious infrastructure under the guise of providing a map PDF. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of direct payload delivery.

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.ru/pify?keyword=blue+mountain+village+map+pdf
    • http://gigege.hamiltonpiano.org/uploads/1/3/1/1/131164250/xejalezeraw.pdf
    • http://files.westwindsfarmcolorado.com/uploads/1/3/0/8/130813042/didobupazegisotarofe.pdf
    • http://files.themobilityfactory.eu/uploads/1/3/0/8/130873971/1372500.pdf
    • http://files.leighscateringchippenham.co.uk/uploads/1/3/0/7/130776757/pupevewefogex.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9966/files/ui_extension_skyrim_se.pdf
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/blu_r1_hd_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5508/files/the_official_comptia_cysa_study_guide_exam_cs0_001.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2995/files/sistema_respiratorio_libro.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7014/files/91456272713.pdf
    • https://cdn.shopify.com/s/files/1/0429/0845/0972/files/26547457967.pdf
    • https://cdn.shopify.com/s/files/1/0431/4031/7350/files/40996951409.pdf
    • https://cdn.shopify.com/s/files/1/0429/2100/1119/files/68700258077.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/notonorexobozokozixosik.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/algorithme_avanc_et_complexit.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/65528882239.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/89127951678.pdf
    • https://cdn.shopify.com/s/files/1/0437/4839/3112/files/oxidative_stress_and_aging.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1930/files/83948412581.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c08.bin
c43d33a0513b9523cc647f036c782c62529e344373ebaf510165d96959921c32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C08 5168 bytes
font_01_sfnt_off00007dda.bin
3a52751265f358658c68bda3ff0a4286e91ae5176044ad5885ca2c6dc79b0151		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDA 5196 bytes
font_02_sfnt_off00008f85.bin
81506346759162aba0a2e2aa78f8873732448521bfea5d6813b4226dde116fa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F85 10316 bytes

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