Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65f5ac7363d0709…

MALICIOUS

PDF

45.3 KB Created: 2020-08-14 04:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9366a7b1dde3f93075a51fc95509f2e SHA-1: 72580384eafc832815b180b5ba19e23cb7033614 SHA-256: e65f5ac7363d070917e6e8bc4f6e1000e593290b29eb2ee95aca712b51a3eeab
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious File

The PDF file was flagged as malicious by a machine learning classifier and contains a link farm of numerous external PDF files, many hosted on Shopify. One of the primary links points to a known malicious redirector, ttraff.cc, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links, suggesting a coordinated effort to distribute potentially harmful files.

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=summary+and+aggregate+reports+tab+in+jmeter
    • http://files.badgerbuildingmover.com/uploads/1/3/1/4/131454151/dimutex_sixasetesizu.pdf
    • http://zenana.supersonicmagazine.com/uploads/1/3/0/7/130776031/dokirub_mijovatowixebud_defateroxig_zosebetul.pdf
    • http://datim.mark-it-pink.com/uploads/1/3/2/6/132681670/bobibipeviropu.pdf
    • http://files.sandalsdoggiestuff.com/uploads/1/3/1/6/131637839/1aa5f21234eb.pdf
    • https://cdn.shopify.com/s/files/1/0438/1288/0544/files/fugafozasuwoxekokunifixi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/ligetobikafamemofe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9594/0503/files/video_editor_windows_10_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/2777/4115/files/74813057513.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1357/files/kikugisura.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6605/files/mameduvilikusokas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wevola.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/31784600108.pdf
    • https://cdn.shopify.com/s/files/1/0436/9822/5320/files/activated_sludge_system.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/aluminium_6061_thermal_properties.pdf
    • https://cdn.shopify.com/s/files/1/0435/7105/2703/files/tofetobowowig.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/tosomaxaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gigogew.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/43875517194.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fd5.bin
975ca1729c5e5aa8b65d40a146f34f8d2292c54d9c626bc4735ff5a49a485ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD5 5668 bytes
font_01_sfnt_off000082ff.bin
3029003c559d4651dcdeac6c8c9c99a45a544d2339d23a3c233a65f150ac08e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82FF 10864 bytes

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