Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5e59ca3357fdfe…

MALICIOUS

PDF

62.9 KB Created: 2020-08-05 04:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19d3e4abc284ed2e37d2423814dd2aed SHA-1: 8e8990b8f5d69ce5d1b8375372eecb56488be2bc SHA-256: 4e5e59ca3357fdfe26fa3f4969f83ee2e24a30b5fec7c1bdc13ea3a246a4170f
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and text related to 'addition subtraction multiplication division worksheets for 4th grade pdf', suggesting a lure. The PDF also contains a mass external PDF link farm, with many links hosted on cdn.shopify.com, indicating a potential SEO spam campaign.

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=addition+subtraction+multiplication+division+worksheets+for+4th+grade+pdf
    • http://files.sojeonglee.com/uploads/1/3/2/6/132680860/sitoxetiderugap.pdf
    • http://files.academyofnatureandwildlifearts.org/uploads/1/3/1/8/131872054/wigepufaxub.pdf
    • http://files.foranbrothers.com/uploads/1/3/2/6/132680781/razebupirugi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5643/8165/files/jenen.pdf
    • https://cdn.shopify.com/s/files/1/0438/4194/5760/files/rebazimixoni.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6073/files/gapebalekapekijozi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/tesimilanimowijowofekave.pdf
    • https://cdn.shopify.com/s/files/1/0438/9906/0392/files/44743813745.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/75368764313.pdf
    • https://cdn.shopify.com/s/files/1/0438/8143/1195/files/21770747673.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/rufexorakixizisavibaxus.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/ziterakovigo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/84770444984.pdf
    • https://cdn.shopify.com/s/files/1/0428/8905/2316/files/58242272949.pdf
    • https://cdn.shopify.com/s/files/1/0429/1595/4847/files/57966219853.pdf
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/ruxitimosoribojutomexadu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4516/7008/files/golapijukojon.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab93.bin
b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB93 2828 bytes
font_01_sfnt_off0000b58e.bin
b68cfcef0949f48436c7863a8f669d622ace55a22ba507b777a231881619189e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB58E 6004 bytes
font_02_sfnt_off0000c9ed.bin
20f0298c88469cfd009ac36b43462fb548652358801674e7f0ce2eda64c97f36		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9ED 9648 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.