Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c0ae48b3468d19…

MALICIOUS

PDF

40.5 KB Created: 2020-08-23 15:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b55ac09b90c22580a5e7f02f3d36bb95 SHA-1: 711482619d1b5071dfeaf965e81a537a644f48f1 SHA-256: 73c0ae48b3468d19d97a6b8b9076adb9e1d483d5d708ec5cbb00173ba1782f87
154 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to a redirector infrastructure. The primary link, disguised as a free template download, leads to `https://ttraff.cc/pify?keyword=free+powerpoint+templates+business+intelligence`, which is flagged as malicious. This suggests the document is part of a link farm or phishing campaign designed to redirect users to malicious sites.

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.cc/pify?keyword=free+powerpoint+templates+business+intelligence
    • http://dejavisi.dsppsu.com/uploads/1/3/2/7/132740285/7926241.pdf
    • http://files.theredleafpractice.com/uploads/1/3/2/8/132815220/nonozunajabegubum.pdf
    • http://files.rosecitytrinityumc.org/uploads/1/3/2/6/132681698/3930896.pdf
    • http://files.quasilocum.com/uploads/1/3/1/3/131380733/dazepip-tefifipipewesex.pdf
    • http://mafijebov.florencetrackclub.com/uploads/1/3/1/8/131856890/zetewegezudik-nerud-zewijonivutuziv-pifudirezun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6574/5309/files/10257090144.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/video_call_recorder_app_apk.pdf
    • https://cdn.shopify.com/s/files/1/0464/7560/8214/files/6540640341.pdf
    • https://cdn.shopify.com/s/files/1/0437/5917/3790/files/apple_social_responsibility.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/email_domains_list.pdf
    • https://cdn.shopify.com/s/files/1/0436/7450/1285/files/feporotojala.pdf
    • https://cdn.shopify.com/s/files/1/0431/8566/8255/files/air_suspension_system.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/adhyatma_yoga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9921/0407/files/suveguvunurezepuze.pdf
    • https://cdn.shopify.com/s/files/1/0429/6641/7567/files/22100814505.pdf
    • https://cdn.shopify.com/s/files/1/0429/4567/5420/files/cracker_barrel_buttermilk_pie_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0432/2541/5843/files/isc_class_11_biology_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0431/6508/9949/files/firewall_ios_for_gns3.pdf
    • https://cdn.shopify.com/s/files/1/0430/6993/1671/files/silov.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_off0000614f.bin
1f99b91c6614f33ace5c89e401588c9ce983f8451d69eb46fd991852b2624433		 pdf-font-stream PDF embedded font (sfnt) at offset 0x614F 5440 bytes
font_01_sfnt_off000073c5.bin
5dafd4bf6fdfb7015f255bd101161e68f01f24df5136584e83d673a11a7c4cd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C5 9652 bytes

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