Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9abd907b325198…

MALICIOUS

PDF

41.6 KB Created: 2020-08-09 09:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65432ee68b5a046141adb8acced540e3 SHA-1: cd0f1059c88ae1dbe99b767c12c507022248eaf3 SHA-256: 0f9abd907b3251981311968a62f858109a43b0dcdf8b921ba85fec48168a39a1
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=pdf+file+download+apkpure', is identified as a malicious redirector. The document body also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy. The ML classifier strongly flagged this PDF as malicious.

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=pdf+file+download+apkpure
    • http://files.brenthubs.com/uploads/1/3/0/7/130776416/jexuremomisos-bazapozifom-kixosi.pdf
    • http://files.notronmfg.com/uploads/1/3/0/7/130776343/xovumomalufij-rugetovuviza.pdf
    • http://files.torontoflowergallery.com/uploads/1/3/1/4/131453031/1503984.pdf
    • http://files.yesandventure.com/uploads/1/3/1/4/131452883/najuzonuxu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0443/1645/9164/files/50669052599.pdf
    • https://cdn.shopify.com/s/files/1/0437/1546/1275/files/tetatagomi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8216/1053/files/slavery_by_another_name_douglas_blackmon.pdf
    • https://cdn.shopify.com/s/files/1/0436/9776/6553/files/arbitrage_trading.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/63494764450.pdf
    • https://cdn.shopify.com/s/files/1/0435/6961/0907/files/rabotekigakire.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/37952025461.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/39132999210.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4815/files/rorejivojixedugulipa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3193/6674/files/lofukaroxud.pdf
    • https://cdn.shopify.com/s/files/1/0435/5362/0136/files/74459287913.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_off00006729.bin
7bc0c7912764215c4c37e7f22170befe51bb1990e3bd16df928d0ba22574adb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6729 5016 bytes
font_01_sfnt_off00007861.bin
0834ea8c605f1ff1cc2856f73511f25fd613899298feae3cf04910593a3cda10
pdf-font-stream PDF embedded font (sfnt) at offset 0x7861 9776 bytes