Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6287178757585a…

MALICIOUS

PDF

42.0 KB Created: 2020-08-22 15:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 108ecd878dd9bb54ca903a456c22b016 SHA-1: ea888dcf5e2c6b420530b2f1aeaf8f1c63bce25e SHA-256: ea6287178757585aab2dc6bb961b0edf0875e1459a9b26533f7e411ba1a21e34
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document is identified as malicious due to its inclusion of a large number of external links, many of which point to potentially malicious redirectors or link farms. The document body, though partially corrupted, contains text suggesting it is a "Instrument cable selection guide", likely a lure to encourage users to click the embedded links. The primary malicious link identified is https://ttraff.com/pify?keyword=instrument+cable+selection+guide, which is flagged as a known malicious redirector.

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=instrument+cable+selection+guide
    • http://files.swornoathbrand.com/uploads/1/3/0/9/130969809/2405583.pdf
    • http://files.themastectomystore.com.au/uploads/1/3/1/8/131856743/jipaxebir.pdf
    • http://files.monteverdimusic.org/uploads/1/3/0/7/130775180/vupizajezepu_piwiwabux.pdf
    • https://cdn.shopify.com/s/files/1/0431/7151/2480/files/activity_indicator_android_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/tuvezowaja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdf
    • https://cdn.shopify.com/s/files/1/0433/5108/1114/files/annuities_questions.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4095/files/korasitapavikafuba.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/jodofiriwuwafozaxuxarutex.pdf
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/zolagofepebup.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2105/files/65192291187.pdf
    • https://cdn.shopify.com/s/files/1/0451/1848/8741/files/big_data_definition_ibm.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_off00006623.bin
71f5391cbb27027830584179d000e7fea16710c31baaa5399a175e695d6e8224
pdf-font-stream PDF embedded font (sfnt) at offset 0x6623 5336 bytes
font_01_sfnt_off0000781d.bin
1ac55c4789344c00ae2b05ec6405a07765a5f1c453a1824704d5244930ee9721
pdf-font-stream PDF embedded font (sfnt) at offset 0x781D 10376 bytes