Malicious PDF — malware analysis report

Static analysis result for SHA-256 65eebbf67fbfb32c…

MALICIOUS

PDF

49.2 KB Created: 2020-08-19 20:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d586265be414a6d7b064eb9a6027a27 SHA-1: 85ceff17403ad9996c3f772a34a3bad8801e9c7f SHA-256: 65eebbf67fbfb32c64f940f5fbd50ddb0e70a0affcfb328d84863612fb6a7869
162 Risk Score

Malware Insights

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

The PDF contains a link disguised as a user manual that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The presence of multiple benign Shopify links suggests an attempt to blend in with legitimate content, while the primary malicious link points to a redirector. No scripts were extracted, but the overall structure and link analysis point to a phishing or redirection attack.

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=alcatel+1+user+manual+pdf
    • http://files.skyladd.com/uploads/1/3/0/7/130775145/rozivifame.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/9502/4023/files/catalogo_ngk_2020_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/annual_school_calendar_2018-_19_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/9643/2021/files/81931194581.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/waves_murcury_bundle.pdf
    • https://cdn.shopify.com/s/files/1/0434/3103/5032/files/wegurogofosuxipanivi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5175/2344/files/xisovofa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1542/1599/files/52025881479.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3434/files/epic_emr_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6314/files/31813028825.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/71816834096.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/tic_tac_toe_javafx.pdf
    • https://cdn.shopify.com/s/files/1/0431/6174/7605/files/381861821.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/fatijofad.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_off000065d2.bin
ce22c8eaa1f53a77d563481fc3f0abc202627ce0e69ac912df19b60822d178aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D2 3724 bytes
font_01_sfnt_off0000730f.bin
e063950be7a6bc13bde898b82d8270e412cad2d8040b3e937856bef463264768		 pdf-font-stream PDF embedded font (sfnt) at offset 0x730F 5064 bytes
font_02_sfnt_off00008428.bin
4b14485a79f2012b3cdfddb5a76775e2837f69caf28c792c41a9a57badc19256		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8428 10916 bytes
font_03_sfnt_off0000a985.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA985 4324 bytes

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