Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2421f95d56a71b…

MALICIOUS

PDF

61.4 KB Created: 2020-08-15 03:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 866e154c06b5d44d90b3bc7beec5f8b8 SHA-1: 20dbaec64780ca25ead9c16964729d41ab160300 SHA-256: 0e2421f95d56a71b8ddeaab99d0035f4cd9760a575a56c12ba18ec2a9ad25900
202 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL that points to a Shopify-hosted PDF, suggesting a link farm or phishing lure. The heuristic firings indicate the PDF links to malicious redirector infrastructure and contains a mass external PDF link farm. The document body also contains the URL and a lure related to protecting Excel sheets, further supporting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.ru/pify?keyword=shortcut+to+protect+sheet+in+excel
    • http://files.uptownpizzachicago.com/uploads/1/3/1/4/131454850/mujaxijuweve_janotafixuna_fanunarezama.pdf
    • http://files.mindfulserenityonline.com/uploads/1/3/0/8/130874629/pezozulaleku.pdf
    • http://files.cougarthreads.com/uploads/1/3/1/3/131398362/zoroselilulefez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/loxujaxetajetuvafara.pdf
    • https://cdn.shopify.com/s/files/1/0431/5296/5792/files/binewojelotegumu.pdf
    • https://cdn.shopify.com/s/files/1/0441/4459/1000/files/liduwotifudubijifudamokez.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/buat_email_gmail_di_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/5217/0392/files/fobupixo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7950/6847/files/33032440384.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8514/files/vutudojefozijiwimu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/infix_to_postfix_c_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/6697/3589/files/86214537192.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/instrumentation_control_data_acquisition_and_processing_with_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0454/1834/8712/files/10331483684.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099c9.bin
3cd11e08ce5b61f10ea54dfdd8bb802fc4d8d263fec619da0ad07c8d7cca6ce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99C9 4864 bytes
font_01_sfnt_off0000aa43.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA43 1800 bytes
font_02_sfnt_off0000b2d0.bin
c0e6cd614d611cb5b99bb1b0f4bca5af77d592467f8370532a23644aa00c95c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D0 12396 bytes
font_03_sfnt_off0000da74.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA74 4324 bytes

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